NEW HAMPSHIRE DEPARTMENT OF TRANSPORTATION

The New Hampshire Department of Transportation (DOT) is tasked w/maintaining the roadways and highways in New Hampshire with emphasis on all State Routes and Interstates. In addition, NHDOT provides traffic control systems (Lights/Signals), Highway/Road Engineering, Snow Removal and all aspects of Interstate/State Route Operations. They Operate Six Regional Divisions, a Turnpike Division, and others divisions suck as engineering, Traffic and others. NHDOT is currently placing a new UHF system in service replacing the existing UHF system and eventually will be a UHF trunked system. For Now they utilize different repeaters (often on different frequencies) for each Division. PL tones are used to access the different repeaters and usually it's best to leave the frequency without PL in the scanner. However, if interested in a specific location, the PL's may come inhandy as all of the repeaters transmit the PL used to talk in.

DIVISION-1 / LANCASTER HQ 453.625 / 110.9 - Ch-1A - Prospect hill, Lancaster 453.275 / 123.0 - Ch-1B - Mt. Washtington, Sargents Purchase 453.500 / 131.8 - Ch-1C - Cannon Mountain, Franconia 453.625 / 141.3 - Ch-1D - Milan Hill, Milan 453.625 / 203.5 - Car-to-Car (Direct) DIVISION-2 / LEBANON, ENFIELD HQ'S 453.125 / 131.8 - Ch-2A - Mt. Kearsarge, Warner 453.125 / 110.9 - Ch-2B - Cardigan Mtn, Orange 453.775 / 141.3 - Ch-2C - Mt. Ascutney, Windsor, Vermont 453.125 / 103.5 - Ch-2D - Moose Hill, Hanover 453.700 / 123.0 - Ch-2E - Mt. Belknap, Gilford 453.700 / 203.5 - Car-to-Car (Direct) DIVISION-3 / GILFORD HQ 453.100 / 103.5 - Ch-3C - Cannon Mountain, Franconia 453.150 / 110.9 - Ch-3G - Mt. Belknap, Gilford 453.025 / 123.0 - Ch-3H - Wittier Mountain, Tamworth 453.150 / 203.5 - Car-to-Car (Direct) DIVISION-4 / SWANZEY HQ 453.250 / 103.5 - Ch-4A - Pitcher Mountain, Stoddard 453.525 / 110.9 - Ch-4B - Hyland Hill, Westmoreland 453.525 / 131.8 - Ch-4C - Mt. Ascutney, Windsor, Vermont 453.350 / D172 - Ch-4D - Pack Monadnock, Peterborough (aka Miller Park) 453.350 / 203.5 - Car-to-Car (Direct) DIVISION-5 / HOOKSETT HQ 453.675 / 103.5 - Ch-5A - Mt. Kearsarge, Warner 453.675 / 110.9 - Ch-5B - Hackett Hill, Bow 453.675 / 123.0 - Ch-5C - Mt. Uncanoonic, Goffstown 453.675 / 131.8 - Ch-5D - Pack Monadnock, Peterborough (aka Miller Park) 453.675 / 156.7 - Ch-5E - Warner Hill, Derry 453.675 / 203.5 - Car-to-Car (Direct) DIVISION-6 / DURHAM HQ 453.625 / 103.5 - Ch-6E - Moulton Hill, Kensington (Seacoast) 453.625 / 192.8 - Ch-6F - Blue Job Mountain, Farmington 453.625 / 203.5 - Car-to-Car (Direct) TURNPIKE (TOLLS) DIVISION OPS / HOOKSETT HQ 453.050 / 103.5 - Ch-A - Blue Job Mountain, Farmington 453.925 / 127.3 - Ch-B - Hackett Hill, Bow 453.925 / 167.9 - Ch-C - Mt. Uncanoonic, Goffstown 453.225 / 131.9 - Ch-D - Moulton Hill, Kensington (Seacoast) 453.050 / 203.5 - Car-to-Car (Direct) STATEWIDE OPERATIONS (Traffic, Signs, Bridges, Engineering, Admin, Survey, etc) 453.975 / 186.2 - Ch-A - Mt. Kearsarge, Warner 453.975 / 103.5 - Ch-B - Mt. Washington, Sargents Purchase 453.975 / 110.9 - Ch-C - Cannon Mountain, Franconia 453.975 /   82.5 - Ch-D - Pack Monadnock, Peterborough (aka Miller Pk) 453.975 /   94.8 - Ch-E - Holden Hill, Stewartstown 453.975 / 123.0 - Ch-F - Blue Job Mountain, Farmington 453.975 /   88.5 - Ch-G - Mt. Belknap, Gilford 453.975 / 131.8 - Ch-H - Whitter Mountain, Tamworth 453.125 / 167.9 - Ch-I - Mt. Ascutney, Windsor, Vermont 453.975 / 203.5 - Car-to-Car (Direct) NHIS RACE SPECIAL OPERATIONS 453.775 / 131.8 - Ch-1/2 453.750 / 131.8 - Ch-3/4 453.625 / 131.8 - Ch-5/6 453.775 / 203.5 - "Mobile-1" 458.775 / 203.5 - "Mobile-2" 453.750 / 203.5 - "Mobile-3" 458.750 / 203.5 - "Mobile-4" NEW STATEWIDE LICENSES 453./458.700 453./458.7625 453./458.775 453./458.7875 453.458.925

NHDOT's numbering system utilizes 3-4 digit numbers. The 1st indicates the Division (8=Turnpikes). The Second & third indicate route areas, unit designation types and three digit units are normally supervisors. Four digit units operate under the given 3 digit unit. For example 2134 is assigned to 213. Other divisions use various numbers not assigned to Turnpikes or numbered divisions.

I would like to thank Scott Rice for this infoirmation. Scott has done extensive research on the NHDOT's new system, frequencies and PL tones. Scott has extensive knowledge of radio operations in the State of New Hampshire Specializing on Public Works, Aviation and Electric Company Operations.