United States of America

United States of America		Area code 1	Common abbreviation USA		Last updated 31-1-2009
Road class	Syntax explanation	Administrative subordination	Sub classes	Zones	System	Remarks
Interstate highway	{`prefix`}(I)[0-9]<1-3>{`suffix`}	national	1-/2-d ending in 0 or 5		grid	Exit numbers usually by mileage
			other 1-/2-d
		state	3-d
United States highway	{`prefix`}(US)[0-9]<1-3>{`suffix`}	national	1-101		grid
			>101
State highway	{`prefix`}[0-9]<1-4>{`suffix`}	state	see region table
Other highways	various	state or county
General description:
Interstate highways: Odd 1- and 2-digit numbers are generally north-south routes, while even numbers are east-west routes. Numbers increase in eastbound and northbound direction respectively. 3-digit numbers are derived from a 1- or 2-digit number by pre-appending a digit. If this digit is odd, the highway is a spur into a city. If it is even, it is a route through or around a city. 3-digit numbers are designated in each state separately, there can be many Interstate highways with the same number in different states. E.g., there are seven Interstates 295. A road can consist of several different parts without connection, e.g. there is an I-84 from Portland to Salt Lake City and another from Scranton to Hartford and Boston. Obviously, there is no planned intermediate part, as for instance for the A4 in Germany, which has a 120 km gap. In accordance with the numbering system, main east-west routes between I-80 and I-90 have even numbers between 80 and 90, and several may have the same number, as long as confusion is avoided by a large distance between them. The network includes two-lane highways without level crossings. In text, Interstate highways are generally referred to as 'I-[number]', though IH is also used, especially in Texas.
US highways: Odd numbers under 102 are generally north-south routes, while 2-digit even numbers are east-west routes. Numbers increase in westbound and southbound direction respectively. This rule is applied less strictly than the corresponding one for Interstates. 3-digit numbers are derived from a 1- or 2-digit number by pre-appending a digit at the beginning. These routes are either parallel or lateral to the routes they are derived from. US highways are sometimes motorways. They usually do not have exit numbers. For a list of all US highways, see Route list.
State highways: State highways are the only type of highways which exist in all states. Each state has its own system and its own shape for state highway shields. Often this is the shape of the state itself, but squares, circles and other shapes are also used. Some states have primary and secondary state highways and there are also other types of numbered roads, like county highways (which are usually numbered per county). For more details see the region table.
Exit numbers: Mostly by mileage, but sometimes sequential, especially on older roads.
State		Interstates	US and State highways		Remarks
Alabama	AL	Mileage	Mileage
Alaska	AK	Do not exist	None
Arizona	AZ	Mileage	Mileage
Arkansas	AR	Mileage	Mileage
California	CA	Mileage	Mileage		New 2002
Colorado	CO	Mileage	Mileage		Very few non-interstate exits numbered
Connecticut	CT	Sequential	Sequential
Delaware	DE	Sequential	Mileage
District of Columbia	DC	Sequential on I-295	None
Florida	FL	Mileage (changed in 2002)	Mileage		Some exceptions
Georgia	GA	Mileage (changed in 2000)	Sequential
Hawaii	HI	Mileage	None
Idaho	ID	Mileage	None
Illinois	IL	Mileage	Mileage		Very few non-interstate exits numbered
Indiana	IN	Mileage	None
Iowa	IA	Mileage	None
Kansas	KS	Mileage	None
Kentucky	KY	Mileage	Mileage
Louisiana	LA	Mileage	None
Maine	ME	Sequential	None
Maryland	MD	Mileage	None
Massachusetts	MA	Sequential	Sequential
Michigan	MI	Mileage	Mileage
Minnesota	MN	Mileage	None
Mississippi	MS	Mileage	None
Missouri	MO	Mileage	None
Montana	MT	Mileage	None		No exits on other roads
Nebraska	NE	Mileage	None
Nevada	NV	Mileage	None
New Hampshire	NH	Sequential	Sequential
New Jersey	NJ	Mileage	Mileage		Exception: NJ Turnpike
New Mexico	NM	Mileage	None		No exits on other roads
New York	NY	Sequential	Sequential		Exception: New York Belt
North Carolina	NC	Mileage	None
North Dakota	ND	Mileage	None		No exits on other roads
Ohio	OH	Mileage	None
Oklahoma	OK	Mileage	Mileage
Oregon	OR	Mileage	None
Pennsylvania	PA	Mileage	None
Rhode Island	RI	Sequential	Sequential
South Carolina	SC	Mileage	None
South Dakota	SD	Mileage	None		No exits on other roads
Tennessee	TN	Mileage	None
Texas	TX	Mileage	None
Utah	UT	Mileage	None
Vermont	VT	Sequential	Sequential
Virginia	VA	Mileage	Sequential
Washington	WA	Mileage	None
West Virginia	WV	Mileage	None
Wisconsin	WI	Mileage	None
Wyoming	WY	Mileage	None
Prefixes and suffixes for all road classes:
Compass directions are added as prefixes to indicate the direction to which a road leads. These are never indicated on maps. This should be distinguished from compass directions as suffixes, which indicate the side of a split road or the position of a spur. Other affixes (may appear either as prefix or as suffix, depending on the state):
ALT	Alternate
BL	Business Loop
BR=BUS	Business Route: provides service from Interstate, US, or State Highways to cities
BS	Business Spur
BYP	Bypass
Road signs:
Road type	Background	Text	Road numbers
			Class	Shape	Background	Text
All roads	Green	White	Interstate		Blue (remark 1)	White
			US		White	Black
Tourist destinations	Brown	White	State	Remark 2	White	Black
Remarks: 1 Business numbers in white on green 2 Every state has its own shape, but most markers are black on white, see State Highway Markers.
History:
Interstate highways: Although the first motorways in the United States were already opened for traffic in the 1920's, the Interstate numbering system was introduced only in 1956. Some numbers were changed later, see this map from 1957: Interstate and Defense Highways.
US highways:The US system was developed according to the 1921 Federal Highway Act and adopted in 1926.
State highways: The first state highway numbering scheme was adopted in Wisconsin in 1917.
Sources and links: Various maps and atlases, personal experience Official sites: Federal US Department of Transportation Federal Highway Administration (FHWA) FHWA route finder Arizona Arizona Department of Transportation California California Department of Transportation Cal-NExUS (California Numbered Exit Uniform System) Colorado Colorado Department of Transportation Connecticut Connecticut Department of transportation Delaware State of Delaware Department of Transportation Florida Florida Department of Transportation Georgia Georgia Department of Transportation Georgia Interstate exit numbering Georgia Navigator Illinois Illinois Department of Transportation Indiana Indiana Department of Transportation Kentucky Kentucky Transportation Cabinet Maryland Maryland State Highway Administration Maryland Transportation Authority Massachusetts Massachusetts Highway Department New Hampshire New Hampshire Department of Transportation New Jersey New Jersey Department of Transportation New Mexico New Mexico Department of Transportation New York New York State Department of Transportation North Carolina North Carolina Department of Transportation Division of highways Ohio Ohio Department of Transportation Oklahoma Oklahoma Department of Transportation Pennsylvania Pennsylvania Department of Transportation Rhode Island Rhode Island Department of Transportation Texas Texas Department of Transportation Vermont Vermont Agency of Transportation Virginia Virginia Department of Transportation Washington Washington State Department of Transportation Wisconsin Wisconsin Department of Transportation Exit numbers in Wisconsin Other links: Federal Interstate Guide US highways AboutVia Route Markers by James Lin Road pictures by Steve Alpert Strip charts by Andrew G. Tompkins AA roads Road sign pictures roadfan.com Road Map Collectors Association Rate the roads Alabama Alabama Routes v0.3 Alabama County highways Arkansas Arkansas County highways California Historic California US Highways by Casey Cooper California Highways Colorado The highways of Colorado by Matthew E. Salek State highways in Colorado Wikipedia District of Columbia DC roads including Maryland and Virginia Maryland roads by Mike Pruett Florida Florida road signs Georgia Georgia roads Georgia highway ends Idaho Idaho state highways Wikipedia Idaho Highways by Nicholas E. Webster Illinois Illinois Highways by Richard Carlson DuPage County Highways Wikipedia Indiana Chris Marysz's Indiana Highways Information Center Indiana highway ends by Richard Carlson Indiana highway ends by Don Hargraves History of St Joseph County roads Iowa Iowa highways Kentucky Kentucky roads Massachusetts Boston roads Michigan Michigan Highways Michigan highway system Wikipedia Michigan highway ends Michigan County highways Michigan roads Bill Burmaster Minnesota The Unofficial Minnesota Highways Page by Steve Riner Mississippi Highways of the State of Mississippi Missouri Missouri Supplemental Routes Wikipedia Mississippi County highways New Jersey New Jersey Turnpike Authority includes Garden State Parkway New Jersey Freeways New Jersey Route Logs New Mexico List of New Mexico highways Wikipedia The Unofficial New Mexico Highways Page by Steve Riner Highway Photos from New Mexico New York nycroads including New Jersey and Connecticut New York State Thruway Authority I-87/I-90 Empire State Roads Reference routes Wikipedia North Dakota County routes in EddyCounty Wikipedia Ohio OH Highways Oklahoma Oklahoma highways Oklahoma roads Oregon Oregon County highways Pennsylvania Phillyroads Pennsylvania Highways by Jeffrey J. Kitsko Philadelphia Highways County highways of South Dakota Texas Texas Highway Routes Wisconsin County Trunk Highways Wikipedia Specific roads US 40 Interstate 95 Coalition Atlantic City Expressway Interstate 444 in Tulsa Pennsylvania Turnpike Other pages within this site: Canada

Region table

Index of States:
01	AL	Alabama	21	KY	Kentucky	38	ND	North Dakota
02	AK	Alaska	22	LA	Louisiana	39	OH	Ohio
04	AZ	Arizona	23	ME	Maine	40	OK	Oklahoma
05	AR	Arkansas	24	MD	Maryland	41	OR	Oregon
06	CA	California	25	MA	Massachusetts	42	PA	Pennsylvania
08	CO	Colorado	26	MI	Michigan	44	RI	Rhode Island
09	CT	Connecticut	27	MN	Minnesota	45	SC	South Carolina
10	DE	Delaware	28	MS	Mississippi	46	SD	South Dakota
11	DC	District of Columbia	29	MO	Missouri	47	TN	Tennessee
12	FL	Florida	30	MT	Montana	48	TX	Texas
13	GA	Georgia	31	NE	Nebraska	49	UT	Utah
15	HI	Hawaii	32	NV	Nevada	50	VT	Vermont
16	ID	Idaho	33	NH	New Hampshire	51	VA	Virginia
17	IL	Illinois	34	NJ	New Jersey	53	WA	Washington
18	IN	Indiana	35	NM	New Mexico	54	WV	West Virginia
19	IA	Iowa	36	NY	New York	55	WI	Wisconsin
20	KS	Kansas	37	NC	North Carolina	56	WY	Wyoming

State	State highways		Other local roads
	Syntax/ Sub classes	System/remarks	County/Area	Class	Syntax	System/remarks
Alabama	[0-9]<1-3> Sub classes: 1-d 2-d 3-d	Even east-west, odd north-south All US highways have a State highway number but these are not signposted	All	County Road	(CR)[0-9]<1-3>	Even east-west, odd north-south Blue pentagon with white text Numbers match at county lines
			Talladega National Forest	Forest Road	FR[15-7][0-9]<1-2>{[CD]}
Alaska	1-11	Sequential No US or Interstate highways	Southeast only	Forest Highway	FH[0-9]<2>
				Forest Road	FR[0-9]<2;4>{-[0-9]<1;3>}; FR[0-9]<5>
				Trail	TR[0-9]<2-3>
Arizona	[0-9]<2-3>{A}; LOOPx0x Sub classes: 2-d 3-d	3 types of derivation are used: 1. Decommissioned US highways retain the same number 2. Derived from existing US highway by pre-appending a digit: US60 --> State 260 3. Derived from state highway with two digits: State 86 --> State 386		Indian Reservation Route	[0-9]<1-4>{[A-G]}	Numbering per county but numbers match at borders
			Coconino	Forest Highway	FH[1-9]
				Forest Road	FR[0-9]<1-4>{[A-K]}
				Trail	TR[0-9]<1-3>
			Apache	County Road	C[0-9]<3>RD; RD[0-9]<4>
Arkansas	[0-9]<1-3> Sub classes: 1-/2-d 3-d	Even east-west, odd north-south, some exceptions	Not in all counties	County Road	CR[0-9]<1-3>	State-wide numbering system
			Ouachita National Forest and Ozark N.F.	Forest Road	FR[0-9]<1-4>
California	[0-9]<1-3> Sub classes: 1-/2-d 3-d	Even east-west, odd north-south Some exceptions: 70, 86, 91 91 derived from former US91, this section is east-west but the original entire route US91 was north-south	Butte	County Road	B[1-9]	Numbers are unique state-wide. Zones are determined by the letter in the number. Some counties are in two zones. Counties not mentioned in this list do not have County roads. Shape: pentagon
			Calaveras		E15
			Del Norte		D[1-9]
			Fresno		J[0-9]<1-2>
			Imperial		S[0-9]<2>
			Kern		J[0-9]<2>
			Lassen		A[0-9]<1-2>
			Los Angeles		N[1-9]
			Mariposa		J[0-9]<2>
			Merced		J[0-9]<1-2>
			Monterey		G[0-9]<2>
			Orange		S[0-9]<2>
			Plumas		A[0-9]<2>
			Riverside		R1-9]
			Sacramento		E[0-9]<1-2>;J[0-9]<1-2>
			San Benito		J1;G13
			San Diego		S[0-9]<1-2>
			San Joaquin		J[0-9]<1-2>
			San Luis Obispo		G[0-9]<2>
			Santa Clara		G[0-9]<1-2>
			Shasta		A[0-9]<2>
			Sierra		A[0-9]<2>
			Stanislaus		J[0-9]<1-2>
			Tehama		A[0-9]<1-2>
			Tulare		J[0-9]<2>
			Tuolomne		E1[0-9];J20
			Yolo		E[1-9]
Colorado	[0-9]<1-3>	Even east-west, odd north-south, some exceptions (100, 105)	Overview	County Road	RD (if only numerical RD exist, even are east-west and odd north-south. Exceptions marked as 'not EO-NS'
				Primary Forest Route	Number in rectangle
				Secondary Forest Route	FR	State-wide numbering
				Grassland Route	GR
				Forest Trail	TR	State-wide numbering
			Adams	[0-9]<2>NRD	xNRD north-south route x miles east of western county line, numbers from 17
			Alamosa	[0-9]<1-2>NLN	xNLN east-west route x miles north of 0RD
				[0-9]<1-2>{S}RD	xSRD east-west route x miles south of 0RD
				N-1[0-9]<2>RD	N-xRD north-south route (x-100) miles east of N-100RD
			Arapahoe	[0-9]<1-3>RD	xRD (x<=50) east-west route at (x-2)/4 miles from northern boundary, exceptions: 16, 34
					xRD (x>51) north-south route at (x-1)/4 miles from western boundary, exceptions: 51, 67.0RD
			Archuleta	County Road	[0-9]<3>RD
				Primary Forest Route	[0-9]<3>
				Secondary Forest Route	FR[AB]; FR[0-9]<3>	Trailing zeroes
				Forest Trail	TR[0-9]<3>
			Baca	[0-9]<1-2>RD	xRD north-south route x miles from west
				[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
				GR[0-9A-Z]<1-2>	GRx and xRD form an integrated system except for GR539
			Bent	[0-9]<1-2>RD	xRD north-south route x-1 miles from west
				[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
			Boulder	[0-9]<1-4>{[AEJW]}RD	90[1-9]RD along county lines
				FR[0-9]<3>{A}; TR[0-9]<3>	in Roosevelt National Forest
			Chaffee	[0-9]<3>{A}RD; FR[0-9]<3>; TR[0-9]<4>
			Cheyenne	[0-9]<1-2>RD	xRD north-south route x miles from west
				[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
			Clear Creek	[0-9]<3>RD; FR[0-9]<3>; TR[0-9]<2-3>
			Conejos	[0-9]<1-2>RD	north-south routes, numbers increasing to the east
				[A-Z]<2>{.5}RD	xRD east-west route ord(x)-1 miles from south, x.5RD 0.5 miles north of xRD
				FR[0-9]<3>; TR[0-9]<3>
			Costilla	[0-9]<1-2>{.5}RD	north-south routes, numbers increasing to the east
				[A-Z]<1-2>RD	West of State highway 159: xRD east-west route ord(x)-1 miles from south
				[A-Z].[1-9]RD	East of State highway 159: (generally) east-west routes
			Crowley	[0-9]<1-2>RD	xRD north-south route x miles from west
				[A-Z]<2>{.5}RD	xRD east-west route ord(x) miles from south, x.5RD 0.5 miles north of xRD
			Custer	[0-9]<3>RD; CV1RD; FR[0-9]<3>; TR[0-9]<3-4>
			Delta	[0-9]<1-2>.[0-9]<2>[DR\|LN\|RD]	Generally north-south, numbers increasing to east
				[A-Z].[0-9]<2>[DR\|LN\|RD]	Generally east-west, numbers increasing to north
				FR[0-9]<3>{.[13][A-G]}; TR[0-9]<3>
			Denver	No local numbers
			Dolores	[0-9]<1-2>.[05]0RD	Generally north-south, numbers increasing to east
				[A-W].00RD	Generally east-west, numbers increasing to south
				Primary Forest Route 5[0-9]<2>; FR[A-Z]{1-9]}; FR[0-9]<3>; TR[0-9]<3>
			Douglas	[0-9]<1-3>{[A-C]}RD; FR[0-9]<3>; TR627
			Eagle	[0-9]<1-3>{A}RD; FR[0-9]<3>; TR[0-9]<4>
			El Paso	FR[0-9]<2-3>; TR[0-9]<3>
			Elbert	[0-9]<1-3>RD	xRD (x even) east-west route (x-2)/4 miles from south
					yRD (y odd) north-south route (y-1)/4 miles from west
			Fremont	{F}[0-9]<1-3>{[ABX]}RD; FR[0-9]<1-4>{A}; TR1336
			Garfield	[0-9]<3>RD; FR[0-9]<3>; TR[0-9]<4>
			Gilpin	[0-9]<1-2>RD; 279RD; GC1RD; FR[0-9]<3-4>; TR[0-9]<3>
			Grand	[0-9]<1-3>{[MN]}RD (not EO-NS); FR[0-9]<3>{.[1-9]}; TR[0-9]<1-3>
			Gunnison	[0-9]<1-3>{[AC]}RD (not EO-NS); FR[0-9]<3-4>{.[1-3][AB]}; TR[0-9]<1-3>
			Hinsdale	[0-9]<1-2>RD; Primary Forest Route 631; FR[0-9]<3>; TR[0-9]<3>
			Huerfano	[0-9]<3>{.[12]}RD; FR[0-9]<3>; TR[0-9]<3-4>{.1}
			Jackson	[0-9]<1-3>{[A-HW]}RD
				FR[0-9]<2-3>; TR11[0-9]<2>	in Routt National Forest
			Kiowa	[0-9]<1-2>RD	xRD north-south route x-1 miles from west
				[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
			Kit Carson	[0-9]<1-2>RD	xRD north-south route x miles from west
				[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
			La Plata	[0-9]<3>{.[ABE]}RD; Primary Forest Route 135; FR[0-9]<3>; FR[A-Z]{[1-9]}; TR[0-9]<3>
			Lake	FR[0-9]<3>; TR[0-9]<3-4>
			Larimer	[0-9]<1-2>{[A-H]}RD	Odd north-south, even east-west, 90[1-9]RD along county line
				FR[0-9]<3>{.1A}; TR[0-9]<3-4>	in Roosevelt National Forest
Las Animas	[0-9]<1-3>.[0-9]RD	xRD (x even) roughly east-west route x/2 miles from south
		yRD (y odd) roughly north-south route (y-1)/2 miles from west
	FR[0-9]<3>; TR[0-9]<4>
Lincoln	[0-9]<1-2>RD	xRD north-south route x-1 miles from west
	[A-Z]RD	xRD east-west route ord(x)-1 miles from south
	[2-4][A-Z]RD	xyRD east-west route 26(x-1)+ord(y)-1 miles from south
Logan	[0-9]<1-2>.[0-9]RD	xRD (x even) east-west route (x-2)/2 miles from south
		yRD (y odd) north-south route (y-1)/2 miles from west
Mesa	[0-9]<2>.[0-9]<2>RD	roughly north-south
	[A-Z]{[ES]}.[0-9]<2>RD; 330ERD	roughly east-west, xE-numbers in the northeast
	FR[0-9]<3>{D}; TR[0-9]<3>
Mineral	[0-9]<3>{A}RD; C-12RD; FR[0-9]<3>; TR[0-9]<3>
Moffat	[0-9]<1-3>{[ABENSW]}RD
	FR[0-9]<2-3>; TR1144	in Routt National Forest
Montezuma	[0-9]<1-2>RD	roughly north-south, increasing to the east
	[A-Z]<1-2>RD	roughly east-west, increasing to the north
	FR[A-Z]{[1-9]}; FR[0-9]<3>; TR[0-9]<3>
Montrose	[0-9]<2>.[0-9]<2>RD; 25RD; [A-Z]<1-2>{[0-9]<2>}RD; FR[0-9]<3>; TR[0-9]<3>
Morgan	[0-9]<1-2>RD	xRD north-south route x miles from west
	[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
Otero	[0-9]<1-2>RD	xRD north-south route x-1 miles from west
	[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
	GR[0-9A-Z]<1-2>	GRx and xRD form an integrated system
Ouray	[0-9]<1-2>{[A-D]}RD; FR[0-9]<3>; TR[0-9]<3>
Park	[0-9]<1-3>{A}RD; FR[0-9]<2-3>; TR[0-9]<2-3>
Phillips	[0-9]<1-2>RD	xRD (x even) east-west route (x-2)/2 miles from south
		yRD (y odd) north-south route (y-1)/2 miles from west
Pitkin	[0-9]<1-2>{[A-D]}RD; FR[0-9]<3>; TR[0-9]<4>
Prowers	[0-9]<1-2>RD	xRD north-south route x-1 miles from west
	[A-Z]<1-2>RD	xRD east-west route ord(x)-1 miles from south
Pueblo	[0-9]<3-4>RD; FR[0-9]<3>; TR[0-9]<4>
Rio Blanco	[0-9]<1-3>{X}RD
	FR[0-9]<3>; TR[0-9]<4>{.1A}	in Routt National Forest
Rio Grande	[0-9]<1-2>{[AENSW]}RD; FR[0-9]<3>; TR[0-9]<3>
Routt	[0-9]<1-3>{[A-HWZ]}RD; R27RD
	FR[0-9]<2-3>; TR11[0-9]<2>	in Routt National Forest
Saguache	[0-9]<1-2>{-[0-9A-Z][A-Z]}RD		north-south route
	[A-Z]<1-2>{-[0-9]<1-2>}RD	east-west route
	FR[0-9]<3>; TR[0-9]<3>
San Juan	[0-9]<1-2>{A}RD; FR[0-9]<3>; TR[0-9]<3>
San Miguel	[0-9]<1-2>{.[0-9]}[A-Z]RD	north-south route
	[A-Z]<1-2>[0-9]<1-2>}RD	east-west route
	FR[0-9]<3>; TR[0-9]<3>
Sedgwick	[0-9]<1-2>RD	xRD (x even) east-west route (x-2)/2 miles from south
		yRD (y odd) north-south route (y-1)/2 miles from west
Summit	[0-9]<1-4>RD; Primary Forest Route [0-9]<1-2>; FR[0-9]<1-4>
Teller	[0-9]<1-3>RD (derivation by appending digits); FR[0-9]<3>; TR[0-9]<3>
Washington	[0-9]<1-2>RD	xRD east-west route x miles from south
	[A-Z]<1-3>RD	xRD north-south route ord(x)-1 miles from west
Weld	[0-9]<1-3>RD	xRD (x even, 2<=x<=140) east-west route (x-2)/2 miles from south
		yRD (y odd, 1<=x<=157) north-south route (y-1)/2 miles from west
	[0-9]<2-4>0RD	xRD (x>140) derived from a lower RD number by appending a digit and a zero. xRD runs between yRD and (y+2)RD with 100y<x<100(y+1) and in the same direction as yRD.
	GR[0-9]<2-3>	GRx and xRD form an integrated system for x<160 (in Pawnee National Grassland)
Yuma	[0-9]<1-2>RD	xRD east-west route x miles from south
	[A-Z]<1-2>RD	xRD north-south route ord(x)-1 miles from west
Connecticut	[0-9]<1-3>{A}	Sub classes: 1-400 (signposted) >400 (not signposted)	In New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont), State highway numbers continue across borders but the numbering is per state. For example, 101 exists in all states. There are no other local road numbers.
Delaware	[0-9]<1-3>	Numbers continue across the border with Pennsylvania	No local road numbers
District of Columbia	295	Derived from I-295	No local road numbers
Florida	A1A; [0-9]<1-4>{A}	Primary	Integrated system, odd north-south, even east-west. All US and Interstate highways have a State highway number. Sub classes: 5;[0-9][05] Other 1-/2-d numbers 3-/4-d numbers Odd 1-/2-d numbers increase to the west, even 1-/2-d numbers increase to the south. 3-d numbers begin with the same digit as east-west routes nearby, and increase to the west. For example, between highways 70 and 80, one finds: * Even 2-d numbers 72-78 * Any odd 2-d numbers * Even 3-d numbers beginning with 7 and increasing to the west * Odd 3-d numbers beginning with 7 and also increasing to the west 4-d numbers are rare. The first digit matches 3-d numbers nearby (and implicitly even 2-d numbers as described above). Multiples of 100 are diagonal routes.
	[0-9]<1-3>{A}	Secondary
Georgia	[0-9]<1-3>{C}	Sub classes: 1-/2-d 3-d Odd north-south, even east-west, exceptions 4, 27 and many 3-d All US and Interstate highways also have a State highway number. These numbers appear on signs along US highways but not along Interstate highways.	Overview	County Road	RD
				Forest Route	FR (in Chattahoochee National Forest)
				City Road	CITY RD	Only in a few counties
				Emergency Road	EM RD
			Appling	CR[0-9]<3>	Only in the southeast
			Atkinson	CR[0-9]<2-3>
			Banks	CR[0-9]<1-3>
			Ben Hill	CR[0-9]<1-3>	CITY RD[0-9]<2-3>
			Berrien	CR[0-9]<1-3>
			Bleckley	EM RD[0-9]<3>
			Brantley	CR[0-9]<2-3>
			Brooks	CR[0-9]<2-3>
			Bulloch	CR[0-9]<3>
			Burke	CR284
			Calhoun	CR[0-9]<1-3>
			Charlton	CR[1-9]	ROAD[1-9] only in the south
			Clay	CR[0-9]<2-3>
			Clinch	CR[0-9]<1-3>
			Coffee	CR[0-9]<1-3>
			Colquitt	CR[0-9]<3>	Only in the east
			Cook	CR[0-9]<2-3>
			Dodge	HWY257
			Early	CR[0-9]<1-4>
			Effingham	CR[0-9]<3>	Only in the south
			Elbert	CR310
			Emanuel	CR[0-9]<3>
			Evans	CR[0-9]<2-3>
			Fannin	CR[0-9]<1-2>
			Franklin	CR[1-3][0-9]<2>
			Gilmer	CR[0-9]<2>
			Hart	CR241
			Irwin	CR[0-9]<1-3>
			Jackson	CR[0-9]<2-3>
			Jasper	CR[0-9]<1-3>
			Jeff Davis	CR[1-3][0-9]<2>	Only in the northeast
			Jefferson	CR[0-9]<1-3>
			Lanier	CR[0-9]<1-3>
			Lowndes	CR[0-9]<1-3>	Only in the southeast
			Macon	CR[0-9]<2-3>	SSR195
			Marion	CR[0-9]<1-3>
			Miller	CR[0-9]<2>
			Mitchell	CR[0-9]<1-3>	CITY RD50
			Muskogee	CR17
			Quitman	CR[0-9]<1-2>
			Randolph	CR[0-9]<1-3>
			Richmond	CR[0-9]<2>
			Schley	CR[0-9]<2-3>
			Screven	CR1[0-9]<2>
			Seminole	CR[0-9]<2-3>
			Stewart	CR[0-9]<2-3>
			Tattnall	CR[0-9]<1-3>
			Taylor	CR[0-9]<2-3>
			Terrell	CR[0-9]<1-5>
			Tift	CR[0-9]<2-3>
			Toombs	CR[0-9]<2-3>
			Turner	CR[0-9]<2>	Only in the northeast
			Twiggs	CR[0-9]<2>
			Ware	CR[0-9]<2-3>	Only in the west
			Warren	CR[0-9]<1-3>
			Webster	CR[0-9]<1-3>
			Wheeler	CR[0-9]<1-3>
			Wilkes	CR[0-9]<2-3>
Hawaii	[0-9]<2-3>{A} Interstae highways H[1-3]	Sub classes: 2-d [0-9]<2>0 [0-9]<2>[1-9]	Zones defined by first digit:	1 Hawaii	No local road numbers
				2 Hawaii North
				3 Maui
				4 Lanai/Molokai
				5 Kauai
				6 Oahu east
				7 Oahu south
				8 Oahu north
				9 Oahu west
Idaho	[0-9]<1-2>;200	Odd north-south, even east-west, but many exceptions 200 is linked to Montana state highway 200	All local road numbers are unique throughout the state
			Bonneville/Clark/ Fremont/Jefferson	County Route	A[1-4]	Pentagon
			Cassia/Twin Falls		G[1-3]
			Nez Perce		P[1-3]
			Several counties	Primary Forest Route	[0-9]<1-4>	All 2-d roads also have a State highway number
				Secondary Forest Route	FR[0-9]<2-4>{[A-G]<1-2>}	Some trailing zeroes
Illinois	[0-9]<1-3>	Grid: 1-4 are main north-south routes and 7-19 are main east-west routes. Other numbers are arbitrary.	County roads: [0-9]<1-2> in most counties, but some also have 3-d or even 4-d numbers. Counties with a special system are listed below.
			Boone	Together have one system: A[0-9]<1-2> east-west, increasing to south, [TVW][0-9]<2> north-south, increasing to east (letters in alphabetical order)		n-s: T only
			Lake			n-s: V and W
			McHenry			n-s: T and V
			Cook	[A-Z]
			Peoria	D[0-9]<2>	east-west, increasing to south
				[RS][0-9]<2>	north-south, increasing to east
Indiana	[0-9]<1-3>	Grid sub classes: 1-/2-d: odd north-south, even east-west 3-d: derived from 1-/2-d state highway or US number by pre-appending a first digit and a trailing zero if applicable	County Roads	CR[0-9]<2-4>[NSEW]	Numbering per county. Normally c=100, for exceptions and counties with other systems see below.
				CRx[NS]	East-west route north or south (respectively) of centre at distance x/c miles
				CRy[EW]	North-south route east or west (respectively) of centre at distance y/c miles
			Clay	CRxE (x odd) east-west	East of State highway 59, north of US40
				CRxE (x even) east-west	East of State highway 59, south of US40
				CRxW (x odd) east-west	West of State highway 59, south of US40
				CRxW (x even) east-west	West of State highway 59, north of US40
				CRxN (x odd) north-south	North of US 40, east of State highway 59
				CRxN (x even) north-south	North of US 40, west of State highway 59
				CRxS (x odd) north-south	South of US 40, west of State highway 59
				CRxS (x even) north-south	South of US 40, east of State highway 59
			Crawford	CR[0-9]<1-3>
			Elkhart	CR[0-9]<1-3>	1-/2-d: odd north-south, (x+1)/2 miles from west, even east-west, (x-1)/2 miles from north, 142 between 42 and 44
			Jay	c=10
			Martin	CR[0-9]<1-3>
			Perry	CR[0-9]<1-3>	FR503
Iowa	[0-9]<1-3>	sub classes: 1-/2-d 3-d	County Routes	(CR)[A-Z][0-9]<1-2>{[A-Z]}	State-wide numbering system, grid:
			[A-J][0-9]<2>	East-west routes, numbers increasing to south (in ASCII order)
			[K-Z][0-9]<2>	North-south routes, numbers increasing to east (in ASCII order)
			[A-J][0-9]<1-2>[K-Z]; [K-Z][0-9][A-J]	Diagonal routes
			Some counties also have single letters or 2-digit numbers without letters
Kansas	[0-9]<1-3>	Grid	County roads	CR, RD, AV	System per county
			Allen	CR[0-9]<3-4>	north-south road, CRx (x-200)/200 miles east of western boundary
			Atchison	[0-9]<3>RD	east-west only: xRD extension of Jackson (x-206)/5 km north of southern boundary
			Barton	[NS][EW][0-9]<2-3>RD	east-west road in [East/West] x/10 miles [North/South] of centre
				[NS][EW][0-9]<2-3>AV	north-south road in [North/South] x/10 miles [East/West] of centre
			Douglas	N[0-9]<1-4>RD	east-west road, NxRD x/100 miles north of southern boundary
			Decatur	[0-9]<1-2>[ENSW]RD	x[ENSW] miles [East/North/South/West] of center
				E[0-9]<1-4>RD	north-south road, ExRD x/100 miles east of western boundary
				[EN][0-9]<2>1DIAG	diagonal roads
			Finney	RD[0-9]<2>	only a few north-south routes
			Ford	1[0-9]<2>RD	north-south, xRD x-100 miles east of western boundary
			Graham	[0-9]<3-4>RD
			Grant	CR[A-Z]<1-2>	CRx east-west ord(x)-1 miles north of southern boundary
				CR[0-9]<1-2>	CRx north-south (x-1) miles east of western boundary
			Gray	[0-9]<1-2>RD	north-south, xRD x-1 miles east of western boundary
				[A-Z]<1-2>RD	east-west, xRD ord(x)-1 miles south of northern boundary
			Harper	[NS][EW][0-9]<2-3>RD	east-west road in [East/West] x/10 miles [North/South] of centre
				[NS][EW][0-9]<2-3>AV	north-south road in [North/South] x/10 miles [East/West] of centre
			Haskell	[0-9]<2-3>RD	east-west, xRD (x-10)/10 miles south of northern boundary
				[A-Y]<2>RD	(two of the same letters) north-south, xxRD ord(x)-1 miles east of western boundary
			Jackson	[A-Y]RD	xRD north-south ord(x)-1 miles east of western boundary
				[0-9]<3>RD	xRD east-west (x-94)/5 km north of southern boundary
			Kearny	CR[0-9]<1-2>	east-west road, CRx x-1 miles south of northern boundary
				CR[A-Y]	north-south road, CRx ord(x)-1 miles east of western boundary
			Labette	[0-9]<3-4>RD	east-west road, xRD (x-500)/1000 miles north of southern boundary
			Lane	[0-9]<3-4>RD
			Lincoln	[A-Z]<1-2>RD	xRD east-west ord(x)-1 miles south of northern boundary
				[0-9]<1-2>RD	xRD north-south (x-1) miles east of western boundary
			Linn	[0-9]<3-4>RD
			Lyon	RD[0-9]<2-3>	east-west road, RDx (x-10)/10 miles north of southern boundary
				RD[A-Z]	north-south road, RDx ord(x)-1 miles east of western boundary
			Meade	[0-9]<1-2>RD	north-south road, xRD x-1 miles east of western boundary
				[A-Z]<1-2>RD	east-west, xRD ord(x)-1 miles south of northern boundary
			Morris	[0-9]<3-4>RD	north-south road (x-100)/100 miles west of eastern boundary
				[A-Z]<1-2>AV	east-west road, xAV ord(x)-1 miles south of northern boundary
			Morton	[0-9]<1-2>RD	north-south, xRD x-1 miles east of western boundary
				[A-Z]<1-2>RD	east-west, xRD ord(x)-1 miles north of southern boundary
			Phillips	[0-9]<3-4>RD
			Rooks	[A-Z]<1-2>RD	xRD east-west ord(x)-1 miles south of northern boundary
				[0-9]<1-2>RD	xRD north-south (x-1) miles east of western boundary
			Scott	[EW]RD[0-9]<2-3>	east-west only: [EW]RDx [West/East] of centre x/10 miles north of southern boundary
			Seward	[0-9]<3-4>RD
			Smith	[0-9]<3-4>RD
			Stafford	[0-9]<3-4>RD
			Stanton	CR[0-9]<1-2>	east-west road, CRx x-1 miles south of northern boundary
				CR[A-Y]	north-south road, CRx ord(x)-1 miles west of eastern boundary
			Stevens	[0-9]<1-2>RD	north-south, xRD x-1 miles east of western boundary
				[A-Z]<1-2>RD	east-west, xRD ord(x)-1 miles north of southern boundary
			Thomas	CR[A-Z]<1-2>	CRx east-west ord(x)-1 miles north of southern boundary
				CR[0-9]<1-2>	CRx north-south (x-1) miles east of western boundary
			Trego	[0-9]<3-4>RD
			Wallace	[A-Z]<1-2>RD	xRD east-west ord(x)-1 miles north of southern boundary
				[0-9]<1-2>RD	xRD north-south (x-1) miles east of western boundary
Kentucky	[0-9]<1-4>	Grid	Sub classes: 1-/2-d: odd north-south, increasing to west; even east-west, increasing to east 3-d 4-d
Louisiana	[0-9]<1-4>	Sub classes: 1-/2-d 3-d 4-d	Parish Road	PR[0-9]<1-4>{A}	Numbering per Parish, only in:
					Beauregard	3-d
					Cameron	3-d
					Claiborne	1- to 3-d
					De Soto	1- to 3-d
					Grant	1- to 3-d
					Jackson	1- to 3-d
					Natchitoches	3- to 4-d
					Rapides	3-d
					Red River	1- to 3-d
					Saint Martin	3-d
					Saint Mary	1- and 3-d
					Tangipahoa	2-d
					Tensas	3-d
					Union	4-d
					Vernon	4-d
					Washington	1- to 3-d
					Winn	4-d
Maine	[0-9]<1-3>{A}	Sub classes: 1-/2-d 3-d	In New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont), State highway numbers continue across borders but the numbering is per state. For example, 101 exists in all states. There are no other local road numbers.
Maryland	[0-9]<1-3>	Sub classes: 1-/2-d 3-d	No local road numbers
Massachusetts	[0-9]<1-3>{A}	Sub classes: 1-/2-d 3-d	In New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont), State highway numbers continue across borders but the numbering is per state. For example, 101 exists in all states. There are no other local road numbers.
Michigan	[0-9]<1-3>	Sub classes: 1-/2-d 3-d	County Route [A-H][0-9]<1-2> In the southwest, there are 3-d numbers without letter.	Some numbers have a trailing zero.
				Allegan, Kalamazoo		A
				Kent		A45; B72
				Muskegan, Oceana, Ottawa		B
				Antrim, Charlevoix, Cheboygan, Emmett, Otsego		C
				Livingston		D
				Alcona, Crawford, Iosco, Ogemaw, Oscoda, Presque Isle, Roscommon		F
				Delta, Dickinson, Menominee		G
				Alger, Chippewa, Luce, Mackinac, Schoolcraft		H
Minnesota	[0-9]<1-3>	Sub classes: 1-d 2-d 3-d	County highway	[0-9]<1-3>{[AB]}	Numbering per county. Most counties only have 1- and 2-d numbers. 3-d numbers occur only in Anoka, Hennepin and Saint Louis.
Mississippi	[0-9]<1-3>	Even east-west, odd north-south Sub classes: 1-/2-d 3-d: [12][0-9]<2> old roads derived from 2-d numbers, for example 178 is the old US78. [3-6][0-9]<2>: zones determined by first digit	Overview	County Road	CR[0-9]<1-5>
				Forest Route	FR (in De Soto National Forest)
			Calhoun	CR[0-9]<1-3>
			Chickasaw	CR[0-9]<1-3>;CR31215
			Clarke	CR[0-9]<3>
			Harrison	FR420{E}
			Holmes	CR[0-9]<2-3>	Odd north-south, even east-west, many exceptions
			Jones	FR2[0-9]<2>{-H}
			Lafayette	CR[0-9]<3>
			Lee	CR[0-9]<3-4>	Odd north-south, even east-west, many exceptions
			Neshoba	CR[0-9]<3>
			Pontotoc	CR[0-9]<3>{[ESW]}	Odd north-south, even east-west, many exceptions
			Prentiss	CR[0-9]<4>	Odd north-south, even east-west, zones determined by first digit
			Sharkey	CR[0-9]<3>
			Tippah	CR[0-9]<3>	Odd north-south, even east-west, zones determined by first digit but many exceptions
			Tishomingo	CR[0-9]<1-3>	Odd north-south, even east-west
			Union	CR[0-9]<1-3>	Odd north-south, increasing to east; even east-west, increasing to north (many exceptions)
			Washington	CR[0-9]<3>	Odd north-south, even east-west
			Wayne	FR2[0-9]<2>
			Webster	CR[0-9]<1-3>
			Wilkinson	CR[0-9]<3>
			Yazoo	CR3
Missouri	[0-9]<1-3>	Even east-west, odd north-south (some exceptions) Sub classes: 1-d 2-d 3-d	Secondary State route [A-Z]<1-2>	Numbering per county (in spite of the class name) but numbers continue across county lines.	Classes: 1-letter 2 same letters 2 different letters (rare)
			County road	CR[0-9]<1-4>	Various special cases see counties below. Zones (if applicable) are determined by the first digit (after `state`-) of each number.
			Forest route	FR[1-8][0-9]<3>	In Mark Twain National Forest
			Andrew	Numbering starts in the northwest corner and increases to the south and east
			Atchison	Numbering starts in the northwest corner and increases to the south and east
			Audrain	CR[0-9]<3>	Odd north-south, even east-west, zones: 1-5 North (increasing to east), 6-9 South (increasing to west)
			Barry	CR2[0-9]<3>	east-west route, CRx is (x-2000)/10 miles from northern border
				CR1[0-9]<3>	north-south route, CRx is (x-1000)/10 miles from western border
			Benton	CR[NS][EW][0-9]<2-4>	Odd north-south, even east-west, even approx. x/100 miles from centerline, odd approx. (x-1)/100 miles from centerline (centrelines divide the county into NW, NE etc.)
			Bollinger	CR[0-9]<3>	All numbers even, zones: 2-4 East (increasing to south), 6-9 West (increasing to north)
			Buchanan	[NS][EW][0-9]<1-2>{RD}	north-south only, [North/South] of State highway 6, (x-10)/10 miles [East/West] of centre
			Butler	CR[0-9]<3>	Odd north-south, even east-west, zones 2-6 evolve in clockwise order
			Callaway	CR[0-9]<3-4>	Odd north-south, even east-west, zones: 1 NE, 2 NW, 3 SW, 4 SE; 4-d near county lines
			Cape Girardeau	CR[0-9]<3>	Odd north-south, even east-west, zones 2-6 evolve in clockwise order
			Carroll	CR[0-9]<3>	Odd north-south, even east-west, zones: 2 NE, 3 SE, 6 SW, 7 NW
			Carter	CR{`state`-}[0-9]<2-3>	Zones 1 NW, 2 South, 3 East; `state` is either a State highway or a Secondary State route
			Chariton	CR[0-9]<3>	Odd north-south, even east-west, zones: 1 NW, 2 Centre, 3 East, 4 South
			Dallas	{CR}`state`-[0-9]<2-3>{.[1-9]}	`state` is either a State highway or a Secondary State route, e.g. CR73-21
			Dent	CR[0-9]<3>	Zones 2-6 evolve in clockwise order around Salem
			Douglas	CR{`state`-}[0-9]<3>	Zones 1-5 evolve in clockwise order; `state` is either a State highway or a Secondary State route
			Dunklin	CR[0-9]<3>	Odd north-south, even east-west, zones 2-7 increase to the south
			Gasconade	CR[0-9]<3>	Odd north-south, even east-west, zones 2-6 increasing to south (even/odd west/east of State highway 19 respectively)
			Gentry	Numbering starts in the northwest corner and increases to the south and east
			Greene	FM[0-9]<1-3>	Farm road, odd north-south, even east-west, increasing to east and south
			Henry	CR[NS][EW][0-9]<2-4>	Odd north-south, even east-west, even approx. x/100 miles from centerline, odd approx. (x-1)/100 miles from centerline (centrelines divide the county into NW, NE etc.)
			Hickory	CR[0-9]<1-3>{LOOP}	Odd north-south, even east-west, increasing to east and south
			Holt	CR[0-9]<3>	east-west only, CRx is (x-100)/10 miles from northern county line
			Howard	CR[0-9]<3>	Odd north-south, even east-west, zones: 1 NE, 2 NW, 3 SW, 4 SE
			Howell	CR{SE}[0-9]<3>; NW[0-9]<3>	Odd north-south, even east-west; no duplication between CR, CRSE and NW
			Knox	Numbering starts in the northwest corner and increases to the south and east
			Laclede	{CR}`state`-[0-9]<3>{[GLR]}	`state` is either a State highway or a Secondary State route, or X44=I-44, e.g. CRX44-616
			Lafayette	Numbering starts in the northwest corner and increases to the south and east
			Lawrence	CR2[0-9]<3>	east-west route, CRx is (x-2000)/10 miles from northern border
				CR1[0-9]<3>	north-south route, CRx is (x-1000)/10 miles from western border
			Livingston	CR[0-9]<3>	Odd north-south, even east-west, zones: 2 NE, 3 SE, 4 SW, 5 NE
			Madison	CR[0-9]<3>	Zones: 2 north of A, east of US67; 3 south of A, east of US67, 4 west of US67
			Maries	CR[0-9]<3>	Zones 2-6 evolve in clockwise order
			Marion	CR[0-9]<3>	Odd north-south, even east-west, zones: 1 NW, 2 SW, 3 NE, 4 SE
			McDonald	CR[NS][EW] `state`-[0-9]<2>{[A-CNS]}	`state` is either a State highway or a Secondary State route, e.g. CRNE76-79S is in the northeast
			Miller	CR`state`-[0-9]<1-2>{[A-C]}	`state` is either a State highway or a Secondary State route, e.g. CR87-2A
			Mississippi	CR[0-9]<3>	Odd north-south, even east-west, numbers (201-520) increase to the south
			Monroe	Numbering starts in the southeast corner and increases to the north and west (exception: 595)
			Montgomery	Numbering starts in the northwest corner and increases to the south and east
			Morgan	`state`-4[0-9]<3>{A}	`state` is either a State highway or a Secondary State route, e.g. 135-439
			New Madrid	CR[0-9]<3>	Odd north-south, even east-west, zones 2-8 increase to the east and north
			Oregon	CR{`state`-}[0-9]<3>	Zones 1-4 evolve in clockwise order; `state` is either a State highway or a Secondary State route
			Osage	CR[0-9]<3>	Odd north-south, even east-west, zones: 2-4 North (increasing to west), 5-7 South (increasing to east)
			Ozark	CR[0-9]<3>	Zones 1, 3, 5, 6, 8, 9 evolve in clockwise order; `state` is either a State highway or a Secondary State route
				CR`state`-[0-9]<3>
			Pemiscot	CR[0-9]<3>	Odd north-south, even east-west, zones 2-5 increase to the south
			Perry	CR[0-9]<3>	All numbers even; zones 2-9 (no 4) evolve in clockwise order
			Phelps	CR[0-9]<3>0	3rd digit: odd north-south, even east-west, zones 1-8 roughly evolve in clockwise order
			Pike	CR[0-9]<1-3>	Odd north-south, even east-west, zones: "0" (1-/2-d) NW, 1 NE, 2 SE, 3 South, 4 SW
			Pulaski	CR85[12]0
			Randolph	Numbering starts in the northwest corner and increases to the south and east
			Reynolds	CR[0-9]<3>	All numbers even; zones 2-9 evolve in clockwise order
			Ripley	{CR}`state`-{[NSEW]-} [0-9]<1-2>{B}	`state` is either a State highway or a Secondary State route, e.g. CR160-W-11
			Saint Clair	CR[NS][EW][0-9]<2-4>	Odd north-south, even east-west, even approx. x/100 miles from centerline, odd approx. (x-1)/100 miles from centerline (centrelines divide the county into NW, NE etc.)
			Saline	CR[0-9]<3>	Odd north-south, even east-west, zones: 1 NE, 2 SE, 3 SW, 4 NW
			Scott	CR[0-9]<3>	Odd north-south, even east-west, zones 2-5 increase to the south
			Shannon	CR[0-9]<3>{-C}	Zones 2 NE, 3NW, 4 SW, 5 SE; `state` is either a State highway or a Secondary State route
				CR`state`-[0-9]<3>{A}
				CR[A-Z]<2>	Derived from Secondary State route by appending a letter (e.g. SSRK -> CRKA)
				CR106B	Occurs twice, derived from State highway 106
Shelby	CR[0-9]<3>	Odd north-south, even east-west, zones: 1 NW/North, 2 NE, 3 SW, 4 SE
Stoddard	CR[0-9]<3>	Odd north-south, even east-west, zones 2-7 increase to the south
Stone	CR`state`-[0-9]<1-3>{[A-CM]}	`state` is either a State highway or a Secondary State route, e.g. CR176-70
Washington	CR[0-9]<3>	Zones 2-6 evolve in clockwise order around Potosi
Wayne	CR[0-9]<3>	Zones: 2 north of E, east of US67; 3 west of US67, 5 south of A, east of US67
Webster	CR[0-9]<3>{L}	Zones 1-6 evolve in clockwise order around Marshfield
Worth	Numbering starts in the northwest corner and increases to the south and east
Montana	[0-9]<1-3>{S}	Sub classes: 1-200 201-569 (secondary)	Various counties	Forest Road	FR[0-9]<2-5>{[A-C]\|.[1-9]}
			Charles M. Russell National Wildlife Refuge	National Wildlife Refuge	NWR[0-9]<3>
			Various counties	Trail	TR[0-9]<1-4>
			Indian reservations	Bureau of Indian Affairs	BIA[0-9]<1-4>
			Beaverhead, Big Horn, Blaine, Custer, Fallon, Powell, Richland, Rosebud, Sweet Grass	County Road	RD[0-9]<1-3>
			Wheatland		RD12[EW][0-9]<2-3>[NS]{[A-E]}; RD191[NS][0-9]<1-2>[EW]{[A-K]}
Nebraska	[0-9]<1-3>{C}	Odd north-south, even east-west, exceptions 1, 91	Secondary State Highways	[LS][0-9]<1-2>[A-Z]
Nevada	[0-9]<2-3>{A}	Sub classes: primary secondary (SSR) Primary and Secondary numbers form an integrated system. Numbers between 100 and 500 (mostly primary) are assigned per county in alphabetical order, but they continue across county lines. Exceptions: 28 and 88 are derived from California State highways, 140 from Oregon. 78 is also an exception.	County	Range (<500)	Other numbers
			Carson City	100-109 (none existing)
			Churchill	110-130
			Clark	140-170	CR113
			Douglas	200-210	FR0[0-9]<2>
			Elko	220-240	FR[0-9]<3>	TR[0-9]<3>
			Esmeralda	260-270
			Eureka	278	CR[0-9]<3>	FR0[0-9]<2>
			Humboldt	290-299
			Lander	200-209	FR[0-9]<3>	HWY35
			Lincoln	310-329	TR[0-9]<3>
			Lyon	330-349	FR[0-9]<3>
			Mineral	350-369	FR[0-9]<3>
			Nye	370-379	FR[0-9]<3>
			Pershing	390-409
			Storey	410-419	513
			Washoe	420-449	CR[1-3][0-9]<2>
			White Pine	480-499	CR[0-9]<3>	FR4[0-9]<2>
New Hampshire	[0-9]<1-3>{[A-C]}	Sub classes: 1-/2-d 3-d Suffix can be derived from US highway (e.g. US202 -> State highway 202A)	In New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont), State highway numbers continue across borders but the numbering is per state. For example, 101 exists in all states. There are no other local road numbers.
New Jersey	[0-9]<1-3>	State route	In most counties	County Routes	[67][0-9]<2>	There are many unnumbered motorways (New Jersey Turnpike, Garden State Parkway, Atlantic City Expressway etc.)
	5[0-9]<2>	Secondary State Route Odd north-south, even east-west but many exceptions. The grid starts in the northeast. The north-south grid exists only in the north and further south there are more exceptions.	Monmouth		[0-9]<1-2>
			Bergen		[0-9]<1-2>
New Mexico	[0-9]<1-4>	Some roads have the number of a former US highway (80) or are derived from one (566).	Overview	County Road	CR	RD in some counties
				Forest Route	FR	Probably State-wide numbering
				Forest Trail	TR
				Bureau of Indian Affairs	BIA[0-9]<1-4> in various Indian Reservations, numbering per reservation
			Carson National Forest	FR[0-9]<2-4>{[A-C]}	FRB;FRT6	TR66
			Catron	CR[0-9]<3>
			Chaves	CR[0-9]<1-3>{[AB]}
			Cibola National Forest	FR[0-9]<2-3>
			Colfax	[AC][0-9]<1-2>RD	CRB[0-9]<1-2>
			Curry (incl. Quay)	CR[0-9]<1-2>	CRx east-west route x-3 miles from southern boundary of Curry
				CR[A-Z]<1-2> north-south route	CRy ord(y)-1 miles from eastern boundary
					CRAy ord(y)+24 miles from eastern boundary
					CRBy ord(y)+48 miles from eastern boundary
			De Baca	CRB0[4-6][0-9A]
			Do�a Ana	CR[A-E][0-9]<2-3> (some with trailing zeroes); CR{G}[0-9]<2>
			Eddy	CR[0-9]<1-3>{A}	Numbering starts in the northwest and increases to the south
			Gila National Forest	FR[0-9]<2-3>{A}
			Guadalupe	CR[1-4][0-9]<1-2>	Two same letters
			Jicarilla Apache Indian Reservation	BIA[0-9]<1-2>
			Lea	CR[0-9]<1-3>{[A-C]}
			Lincoln	CR[ABEF][01][0-9]<2>
			Lincoln National Forest	FR[0-9]<3-4>{[AB]}
			McKinley	CR[0-9]<1-2>
			Navajo Indian Reservation	BIA[0-9]<1-4>
			Otero	CR{[A-G]}[0-9]<1-3>
			Pueblo de Taos Indian Reservation	BIA[0-9]<3>
			Quay	has one system with Curry
			Sandoval	CR[0-9]<2>	Only in the north
			San Juan	CR[0-9]<4>
			San Miguel	CR[A-C][0-9]<2>{[A-C]}
			Santa Fe	CR[0-9]<1-3>{[A-E]}	Increasing to the north
			Santa Fe National Forest	FR[0-9]<2-3>
			Sierra	CRA[0-9]<2>
			Socorro	CR[0-9]<2-3>
			Torrance	CR[A-C][0-9]<3>	Zones A, B and C
			Union	CR[A-C]0[0-9]<2>; CR[A-Z]<1-2> (two same letters)
New York	[0-9]<1-3>{[A-R]}	Suffixed numbers can be derived from US highways (e.g. US9 ->State 9L)	County highways	[0-9]<1-3>	Numbering per county Not in all counties	There are many unnumbered main roads
			Niagara	Optional prefix 2/
	9[0-9]<2>[A-Z]	Reference routes: not signposted except on distance markers				Many are expressways and parkways
North Carolina	[0-9]<1-4>	Sub classes: 2-d 3-d Derivation: 10 -> 11 -> 111	Charlotte	City RD4
	4-d	Numbering per county
North Dakota	[0-9]<1-3>	There are only a few 3-/4-d numbers: 200, 256, 297, 810, 180[46]. 200 is a continuation of Montana 200, 810 is derived from the former US10, and 1804 and 1806 indicate routes travelled by Lewis and Clark in those years.	County Roads	CR[0-9]<1-2>{A}	Special cases listed below
			Grand Forks and Nelson	have one common system
			Morton	CR[0-9]<1-3>
			Ramsey and Walsh	have one common system
			Spirit Lake Indian Reservation	BIA[0-9]<1-2>	Bureau of Indian Affairs
Ohio	[A-Z]<1-3>	Sub classes: 1-/2-d 3-d	County	County Routes	Township Routes
			Adams	C[0-9]<2-3>	T[0-9]<2-3>
			Ashland	C[0-9]<2>{A};C[0-9]<3-4>	T[0-9]<3-4>
			Belmont	C[0-9]<1-3>{A}	T[0-9]<1-3>{A}
			Coshocton	C[0-9]<1-3>	T[0-9]<1-3>
			Fulton	[0-9]<1-3>RD	north-south roads: xRD, x<30, ca. x-1 miles west of eastern boundary; xRD, x>30: ca. x/10-1 miles west of eastern boundary
				[A-U]<1-2>RD	east-west roads: 1-letter: yRD ord(y)-1 miles north of southern boundary; two letters: e.g. MNRD between MRD and NRD
			Hancock	C[0-9]<2-3>	T[0-9]<2-3>
			Hardin	C[0-9]<2-3>	T[0-9]<2-3>
			Henry	[A-Z]<1-2>{[0-9]} east-west; [A-Z][0-9]<1-2>{[A-Z]} north-south
			Hocking		T[0-9]<1-2>
			Holmes	C[0-9]<1-3>	T[0-9]<1-3>
			Jefferson	C[0-9]<2>	T[0-9]<1-3>
			Logan	C[0-9]<2-3>	T[0-9]<2-3>
			Meigs	C[0-9]<1-3>	T[0-9]<1-3>
			Monroe	C[0-9]<3-4>	T[0-9]<1-4>{A}
			Morgan	C[0-9]<1-3>	T[0-9]<1-3>
			Noble	C[0-9]<1-3>	T[0-9]<1-3>
			Perry		T[0-9]<1-3>{A}
			Putnam	[A-Z][0-9]<1-2> east-west; [0-9]<1-2>[A-Z] north-south, [A-Z] other
			Sandusky	[0-9]<1-3>	Even north-south, odd east-west
			Seneca	C[0-9]<1-3>	T[0-9]<1-3>
			Williams	[0-9]<1-4>RD	north-south roads: xRD, x<25, ca. x-1.2 miles east of western boundary; xRD, x>25: ca. x/100-1.2 miles east of western boundary
				[A-S]{[0-9]<1-2>}RD	east-west roads: yRD ord(y)-1 miles north of southern boundary; digits are used for derived roads north of the ones without the digits
			Tuscarawas	C[0-9]<1-3>	T[0-9]<1-3>
			Vinton	C[0-9]<1-2>{[AC]}; [0-9]<1-2>[A-Z]
			Washington	C[0-9]<1-3>	T[0-9]<1-3>
			Wyandot	C[0-9]<2-3>{A}	T[0-9]<2-3>{A}
Oklahoma	[0-9]<1-3> {[A-HSW]}	Sub classes: 1-/2-d 3-d	Secondary State highways are numbered using a state-wide system:
			N[0-9]<4>RD	NxRD is a north-south route (x-10)/10 miles from the western boundary
			E[0-9]<4>RD	NxRD is an east-west route (x-10)/10 miles from the northern boundary
			When a road is not completely straight, a D is used instead of E or N. Other special cases are listed below:
			Cleveland	No lower class road numbers
			Le Flore	CR[DEN]x instead of [DEN]xRD
			Tulsa	No lower class road numbers
			Okfuskee	CR124
			Texas	CR[0-9]<1-2>	County Roads
			Oklahoma	No lower class road numbers
			Pontotoc	CR[0-9]<3>	County Roads
			Ouachita National Forest	FR[0-9]<4>	Forest Routes
Oregon	[0-9]<1-3>	Grid: odd north-south, even east-west. Even 1-/2-d numbers increase to the south in the west, and then to the north in the east	Primary Forest Route	[0-9]<2>	In national forests, numbering per forest	Number in rectangle
			Secondary Forest Route	NFD[0-9]<2-4>		trailing zeroes in 3-d numbers
			State Forest Route	SFR[0-9]<4>	in Elliott State Forest
			Forest Trail	[0-9]<2-4>TR	Probably state-wide numbering system
			Sometimes derivation from Primary to Secondary Forest Routes occurs by appending digits
Pennsylvania	[0-9]<1-3>	State highway 17 occurs twice. One is an extension of NY State highway 17.	State Route	SR[1-4]0[0-9]<2>	Numbering per county in spite of class name
			Township Road	T[0-9]<3>	Only in some counties, numbering per county
			Forest highway	[0-9]<3>	Allegheny National Forest
Rhode Island	[0-9]<1-3>{A}	Suffix can be derived from US highway (e.g. US1 -> State highway 1A)	In New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont), State highway numbers continue across borders but the numbering is per state. For example, 101 exists in all states. There are no other local road numbers.
South Carolina	[0-9]<1-3>	Numbers continue across state lines but systems are not common. Sub classes: 1-/2-d 3-d	Secondary State Route	SSR[0-9]<2-4>	Sub classes: 2-d 3-d 4-d (not strict)	Numbering per county in spite of class name
South Dakota	[0-9]<2-4>	Sub classes: 2-d 3-/4-d 1804 and 1806 are the only 4-d numbers. They continue in North Dakota.	County	County Roads	Forest Routes	Bureau of Indian Affairs
			Bennett	CR10
			Buffalo			BIA[1-9]
			Corson			BIA[1-9]
			Custer	CR[0-9]<3>	FR[1-9]{[A-CFRW]};FR[0-9]<3>
			Dewey			BIA[1-9]
			Fall River	CR236	FR1A;FR3[0-9]<2>
			Hand	CR7
			Harding	7[0-9]<2>RD	FR1[0-9]<2>
			Hyde	CR776
			Jackson			BIA[1-9]
			Lake	CR52
			Lawrence	CR[0-9]<2-3>	FR[1-9]{[AB]};FR[0-9]<3>
			Lyman			BIA[0-9]<1-2>
			McPherson	CR[1-9]
			Meade	CR26 (from Lawrence)	FR[0-9]<3>
			Moody	CR[A-N]
			Pennington	CR[CT][0-9]<3>	FR[0-9]<3>
			Perkins	CR[1-9]
			Shannon			BIA[0-9]<1-2>
			Ziebach			BIA[1-9]
Tennessee	[0-9]<1-3>	Sub classes: Primary Secondary Integrated system. All US highways have a State highway number.	Cherokee National Forest and Nantahala National Forest	Forest Route	FR[0-9]<2-4>{[A-T]\|-[01]}
				Forest Trail	FT[0-9]<2-3>
Texas	[TEXAS\|LOOP\|SPUR][0-9]<1-3>{[A-Z]};LOOP1604	Interstate and US highways also have letter suffixes [A-Z].	Farm/Ranch to Market	[FR]M[0-9]<1-4>	State-wide numbering
			Recreational Road	(R)R[0-9]<1-3>
			Park Road	PARK[0-9]<1-4>
			Forest Highway	FH[0-9]<2>	All FH also have a State or Farm/Ranch to Market number
			Forest Road	FR[0-9]<3-4>{[A-F]}
Utah	[0-9]<1-3>	Sub classes: 1-/2-d 3-d	Forest Highway	FH[0-9]<2>
			Forest Road	FR[0-9]<2-3>	Some numbers have trailing zeroes
			Park Road	PR[1-4]	Capitol Reef National Park
			(Forest) Trail	TR[0-9]<3>	Some numbers have trailing zeroes
			County Road	[0-9]<3-5>RD	Some numbers have trailing zeroes
			Recreation Road	REC RD[0-9]<3>
Vermont	[0-9]<1-3>{[A-C]}	Suffix can be derived from US highway (e.g. US7 -> State highway 7B)	In New England (Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont), State highway numbers continue across borders but the numbering is per state. For example, 101 exists in all states. There are no other local road numbers.
Virginia	[0-9]<1-3>	Sub classes: 1-/2-d 3-d	Secondary State highway	[0-9]<3-4>	Numbering per county in spite of class name	Numbers from 600
Washington	[0-9]<1-3> Grid Odd north-south, even east-west, odd numbers increasing to the east	Sub classes: 1-/2-d 3-d: derived from 1-/2-d numbers (also from US and Interstate highways) by appending digits	Forest Route	FR[0-9]<2-4>	Numbering per forest	4-d numbers are generally derived from 2-d numbers by appending digits. Some 3-d numbers begin with 0.
West Virginia	[0-9]<1-3>	Sub classes: 1-/2-d 3-d	County Road	(CR)[0-9]<1-3>{/[0-9]<1-2>}	Numbering per county. Derivation: CRx/y is derived either from CRx, State highway x or USx. CRx{/y} where x has 3 digits is derived from USx or from State highway x in an neighboring state.	Black number in white circle. Division line '/' is horizontal on signs but administrative notation is as given here.
Wisconsin	[0-9]<2-3>	Sub classes: 2-d 3-d	County Trunk Highway	[A-Z]<1-3>	When more than one letter is used, these are usually the same (AA, CCC). Numbering per county but numbers continue across county lines. Derivation x --> xx.
			Forest Route	FR[0-9]<3-4>	Chequamegon National Forest
				FR[0-9]<4>	Nicolet National Forest
Wyoming	[0-9]<2-3>	State highway numbers are assigned to counties in alphabetical order (20 per county). The lowest possible number is in principle 10 times the FIPS (Federal Information Processing Standard) code of the county. Exceptions are numbers derived from 2-d US highways by pre-appending a first digit, e.g. US20 --> State 120, 220 US87 --> State 387 Also, 22 and 789 are special US highways do not continue through Yellowstone National Park	Overview	Forest Highway	FH
				Forest Road	FR, numbering per forest: not unique in Sublette 3-d numbers often have trailing zeroes
				(Forest) Trail	TR
				Bureau of Land Management	BLM
				County Road	RD, also LN in certain counties
			County	Range of State highways	Other local roads
			Albany	10-29	RD[0-9]<2-3>, FR[0-9]<3>, TR[0-9]<3>
			Big Horn	30-49	RD[0-9]<3>{1/2}, LN[0-9]<1-2>{1/2}, FH[0-9]<2>, FR[0-9]<3>, TR[0-9]<2-3>, BLM11[0-9]<2>
			Campbell	50-69	RD[0-9]<3>
			Carbon	70-89	RD[0-9]<1-3>{[AN]}, FR[0-9]<3>, TR[0-9]<3>, BLM3[0-9]<3>
			Converse	90-109	RD[0-9]<1-2>, FR[0-9]<3>
			Crook	110-129	RD[0-9]<1-3>{A}, FR[0-9]<3>
			Fremont	131-149	RD[0-9]<2-3>{A}, FH[0-9]<3>, FR{[1-9]}[A-H];FR3[0-9]<2>, TR[0-9]<3>{[13][AB]};TR30[0-9]<2>, BLM[23][0-9]<3>
			Goshen	150-169	RD[0-9]<1-3>
			Hot Springs	170-189	RD[0-9]<1-2>, BLM13[0-9]<2>
			Johnson	190-209	RD[0-9]<2-3>, FH[0-9]<2>, FR[0-9]<3>, TR[0-9]<2>
			Laramie	210-229	RD[0-9]<3>{-[1-8]}
			Lincoln	231-249	RD[0-9]<3>, FH[1-9], FR10[0-9]<3>, TR[0-9]<3>
			Natrona	250-269	RD[0-9]<3>, BLM63[0-9]<2>
			Niobrara	270-289	RD[0-9]<2>{A};28RD
			Park	290-309	RD[0-9]{[A-Z]<2-3>};RD[0-9]<2>{[A-Z]}, LN[0-9]<1-2>{1/2\|W}, FH[0-9]<3>, FR[0-9]<1-3>{[A-C]}, TR[0-9]<3-4>, BLM12[0-9]<2>
			Platte	310-329	RD[0-9]<3>{[AS]}
			Sheridan	330-349	RD[0-9]<2-4>, FH[0-9]<2>, FR[0-9]<3>, TR[0-9]<1-3>
			Sublette	350-369	RD[0-9]<3>, FH[1-9], FR[0-9]<3>;FR[13]0[0-9]<3>, TR[0-9]<3>, BLM5[14][0-9]<2>
			Sweetwater	370-389	RD[0-9]<1-2>{[A-N]}, FR[0-9]<3>, BLM[32\|44][0-9]<2>
			Teton	390-409	RD[0-9]<2>, FH[1-9], FR3[01][0-9]<2-3>, TR[0-9]<3>{A};TR3[0-9]<3>
			Uinta	410-429	RD[0-9]<3>, FR[0-9]<3>
			Washakie	431-449	RD[0-9]<2>, LN[0-9]<1-2>, FH[0-9]<2>, FR[0-9]<3>, BLM[14\|62][0-9]<2>
			Weston	450-469	RD[0-9]<1-2>{[AC]}

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United States of America

Region table

Index of States: