| red = obsolete |
| R | Route | Remarks |
| 101 | Ring Dublin North |
| 102 | Blanchardstown - R107 |
| 103 | Finglas - Killester |
| 104 | Finglas - Kilbarrack |
| 105 | Irishtown - Dublin - Howth |
| 106 | Swords - Sutton |
| 107 | Dublin - Yellow Walls |
| 108 | Dublin - Drogheda |
| 109 | Dublin - Lucan |
| 110 | Clondalkin (M50) - Dublin |
| 111 | R109 - Irishtown |
| 112 | Palmerston - N11 |
| 113 | Lucan (N4) - Blackrock |
| 114 | Dublin - Brittas |
| 115 | Willbrook - Sally Gap - Laragh |
| 116 | Willbrook - Loughlinstown |
| 117 | Dublin - Enniskerry - Bray |
| 118 | Dublin - Loughlinstown (M50) |
| 119 | Blackrock - Bray - N11 |
| 120 | Lucan - Rathcoole |
| 121 | R122 - Lucan |
| 122 | Finglas - Balbriggan |
| 123 | Kinsaley - Portmarnock |
| 124 | R123 - Malahide |
| 125 | Swords - Kilcock |
| 126 | R132 - Portrane |
| 127 | Blakes Cross (R132) - Skerries - Balbriggan |
| 128 | Lusk - Skerries |
| 129 | Corduff - Oldtown |
| 130 | Ward (R135) - Grallagh (R122) |
| 131 | Dublin: Clonliffe (N1) - Merrion |
| 132 | Dublin - Swords - Balbriggan - Drogheda - Dundalk - GB (A1) | former N1 |
| 133 | Ballycragh (R113) - Sandyford (M50/N31) | former R823 |
| 134 | Walkinstown (R110/R810) - Milltown (R120) |
| 135 | Dublin - Ashbourne | former N2 |
| 136 | Dublin west Outer Ring Road (Lucan (N4) - Clondalkin (N7)) |
| 137 | |
| 138 | |
| 139 | |
| 140 | |
| 141 | |
| 142 | |
| 143 | |
| 144 | |
| 145 | |
| 146 | |
| 147 | |
| 148 | Leixlip - Kilcock - Innfield - Kinnegad | former N4 |
| 149 | Clonee - Leixlip |
| 150 | Kentstown (R153) - Julianstown - Bettystown - Drogheda (R132) |
| 151 | Bettystown - Mornington |
| 152 | N2 - Drogheda |
| 153 | Balrath - Navan |
| 154 | Black Bull - Trim - Crossdoney |
| 155 | Black Bull - N2 |
| 156 | Clonee - Mullingar |
| 157 | Dunboyne - Maynooth |
| 158 | Kilcock - Trim |
| 159 | Innfield - Laracor |
| 160 | Trim - Ballynadrumny |
| 161 | Navan - Kinnegad |
| 162 | Navan - Monaghan |
| 163 | Slane - Kells - Ballinlough |
| 164 | Athboy - Kells - Kingscourt |
| 165 | N2 - Stradone - Tullyvin |
| 166 | Drogheda - Castlebellingham - Tallanstown (- Reaghstown) |
| 167 | Drogheda - Termonfeckin |
| 168 | Drogheda - Collon |
| 169 | Collon (N2) - Dunleer |
| 170 | R166 - Ardee |
| 171 | Ardee - Dundalk |
| 172 | Blackrock (N1) - Dundalk |
| 173 | Dundalk - Omeath - GB (B79) |
| 174 | Jenkinstown - Ravensdale (N1) |
| 175 | The Bush - Greenore |
| 176 | Greenore - Carlingford |
| 177 | Dundalk - GB (A29) |
| 178 | Dundalk - Carrickmacross - Virginia |
| 179 | Carrickmacross - GB (B30) |
| 180 | Carrickmacross - Ballybay |
| 181 | Shercock - Castleblayney - GB (B32) |
| 182 | Castleblayney - GB (A25) |
| 183 | Castleblayney - Clones |
| 184 | Ballybay - Clontibret |
| 185 | Monaghan - Glaslough |
| 186 | Monaghan - GB (B83) |
| 187 | Monaghan (N54) - GB (B36) |
| 188 | Cavan - Monaghan |
| 189 | Cootehill (R188) - Monaghan |
| 190 | Ballybay - Cootehill |
| 191 | Mullagh - Cootehill |
| 192 | Shercock (R162) - Cootehill |
| 193 | Aghnamullen - Rockcorry |
| 194 | Moynalty - Longford |
| 195 | Castlepollard - Virginia |
| 196 | Ballyjamesduff - New Inn |
| 197 | Belturbet - N54 |
| 198 | Cavan - Longford |
| 199 | Crossdoney - Ballinamore |
| 200 | N87 - Drumkeeran |
| 201 | Belturbet (N87) - Drumsna |
| 202 | Dromod - Ballinamore - N87 |
| 203 | Arvagh - Carrigallen |
| 204 | Carrigallen (R201) - Ballinamore |
| 205 | R199 - Ballyconnell - GB (B127) |
| 206 | Glangevlin - Gortahill (N16) |
| 207 | Leitrim (R280) - Gortahill (N16) |
| 208 | Ballinamore (R202) - Drumshanbo (R280) |
| 209 | R280 - Fenagh |
| 210 | R209 - Drumcong |
| 211 | |
| 212 | Cavan - Clones |
| 213 | Castleshane - N2 |
| 214 | Castleshane - GB (B3) |
| 215 | |
| 216 | |
| 217 | |
| 218 | |
| 219 | |
| 220 | |
| 221 | |
| 222 | |
| 223 | |
| 224 | |
| 225 | |
| 226 | |
| 227 | |
| 228 | |
| 229 | |
| 230 | Ballyshannon - GB (A46) | changed to N3 |
| 231 | Ballyshannon - Ballintra |
| 232 | Pettigoe - Laghy |
| 233 | Pettigoe - Lough Derg |
| 234 | Pettigoe - GB (B136) |
| 235 | Castlefinn - GB (- Castlederg) |
| 236 | Kilross - Saint Johnstown - GB (A40) |
| 237 | Newtown Cunningham - Killea - GB (B193) |
| 238 | GB (A2) - Muff - Bridge End |
| 239 | Speenoge - Muff |
| 240 | Quigley's Point - Cardonagh |
| 241 | Moville - Greencastle |
| 242 | R238 - Malin - Bulbinbeg |
| 243 | Culdaff (R238) - Malin |
| 244 | Drumfree - Carndonagh |
| 245 | Letterkenny - Creeslough |
| 246 | Millford - Portsalon |
| 247 | Rathmelton - Carrowkeel |
| 248 | Carrigart - Downies |
| 249 | Rathmelton - Kilmacrenan |
| 250 | Letterkenny - Glenties |
| 251 | Rashedoge - Gweedore (N56) |
| 252 | Balleybofey - Dunglow (N56) |
| 253 | Welchtown - Glenties |
| 254 | Drumbologe - Doocharry |
| 255 | Termon - R251 |
| 256 | Falcarragh - Ballyness |
| 257 | Dore (N56) - Gortahork |
| 258 | Gweedore - Bunbeg |
| 259 | Dunglow - Crolly |
| 260 | R259 - Burtonport |
| 261 | Ardara - Maas |
| 262 | Frosses (N56) - Kilrean |
| 263 | N56 - Malin Beg |
| 264 | Rossgeir - Raphoe |
| 265 | Rossgeir - Saint Johnstown - R237 |
| 266 | R259 - Donegal Airport |
| 267 | Laghy (N15) - Donegal - N15 |
| 268 | |
| 269 | |
| 270 | |
| 271 | |
| 272 | |
| 273 | |
| 274 | |
| 275 | |
| 276 | |
| 277 | |
| 278 | |
| 279 | Cliffony - Mullaghmore |
| 280 | Carrick-on-Shannon - Bundoran |
| 281 | Glenfarne - Kinlough |
| 282 | Manorhamilton (R280) - Rossinver - GB (B53) |
| 283 | Manorhamilton - Kiltyclogher |
| 284 | Leitrim - Sligo (N4) |
| 285 | R280 - Keadew |
| 286 | Lurganboy (N16) - Sligo |
| 287 | Gortgarrigan (R280) - Sligo |
| 288 | Dromahair - Moneyduff |
| 289 | R280 - Dromahair (R287) |
| 290 | Gortlownan (R287) - Collooney - Ballysadare |
| 291 | Sligo - Rosses Point |
| 292 | Belladrihid - Strandhill - Sligo |
| 293 | Ballyhaunis - Collooney (N17) |
| 294 | Boyle - Ballina |
| 295 | Boyle (R294) - Ballymote (R293) |
| 296 | Ballymote - Bunnanaddan (R294) |
| 297 | Dromore West - Dooyeaghny |
| 298 | N59 - Inishcrone (R297) |
| 299 | Drumsna - Leitrim (R280) |
| 300 | Partry (R330) - Clonbur (R345) |
| 301 | |
| 302 | |
| 303 | |
| 304 | |
| 305 | |
| 306 | |
| 307 | |
| 308 | |
| 309 | |
| 310 | Castlebar - Ballina |
| 311 | Castlebar - Newport |
| 312 | Castlebar (R311) - Bellacorick |
| 313 | Bangor - Blacksod |
| 314 | Ballina - Belmullet (R313) |
| 315 | Pontoon - Ballycastle |
| 316 | Derreen - Castlehill (R315) |
| 317 | Newport - R312 |
| 318 | Foxford - R310 |
| 319 | Mulrany - Moyteoge Head |
| 320 | Claremorris - Swinford |
| 321 | Kiltimagh - Strade (N58) |
| 322 | Killkelly - Kiltimagh |
| 323 | Ballyhaunis - Kiltimagh |
| 324 | Kiltimagh - Balla |
| 325 | Castlerea (R361) - N17 |
| 326 | Loughglinn - R293 |
| 327 | Kilnalag - Claremorris (N60) |
| 328 | Moylough - Ballindine |
| 329 | former N17 in Knock |
| 330 | Partry - Westport |
| 331 | Ballinrobe - Claremorris |
| 332 | Moylough (N63) - Kilmaine |
| 333 | Tuam (N17) - Headford (N84) |
| 334 | Headford - Ballinrobe |
| 335 | Leenane (N59) - Westport |
| 336 | Galway - Leenane |
| 337 | Galway - Knocknacarra |
| 338 | Oranmore - Salthill |
| 339 | Caltra - Galway |
| 340 | R336 - Recess (N59) |
| 341 | N59 - Roundstone - Clifden |
| 342 | Cashel (R340) - Toombeola |
| 343 | Costelloe - Carraroe |
| 344 | Recess - Letterfrack (N59) |
| 345 | Neale - Maum |
| 346 | Cross - Cong |
| 347 | Kinvarra - Tuam |
| 348 | Ballinasloe - Athenry - N6 |
| 349 | Loughrea - Esker (R348) |
| 350 | Loughrea - New Inn (R348) |
| 351 | Gorteeny (R352) - Loughrea |
| 352 | Portumna - Ennis |
| 353 | Portumna (R352) - Gort (N66) |
| 354 | |
| 355 | Ballinasloe - Portumna |
| 356 | Cloghan - Killimor |
| 357 | Blue Ball - Athleague |
| 358 | Ballinasloe - Mountbellew |
| 359 | Cloonymorris - Mountbellew (R358) |
| 360 | Ballymoe - Dunmore |
| 361 | Derrywode - Boyle |
| 362 | Athlone - Gortaleam |
| 363 | Bellanamullia (R362) - Newbridge |
| 364 | Moylough - Ballymoe |
| 365 | Mountbellew bypass |
| 366 | Roscommon - Passage |
| 367 | Tulsk - Ballymoe (N60) |
| 368 | Four Mile House - Carrick-on-Shannon |
| 369 | Elphin - Bellanagare |
| 370 | Carrick-on-Shannon - Frenchpark (R361) |
| 371 | Roosky - Ballyclare |
| 372 | R336 - Rossaveal |
| 373 | N60 - Castlebar |
| 374 | Costelloe - Lettermullen |
| 375 | Killkelly - Swinford |
| 376 | N17 - Knock Airport |
| 377 | |
| 378 | Louisburgh (R335) - Roonah |
| 379 | Streamstown (N59) - Cleggan |
| 380 | |
| 381 | |
| 382 | |
| 383 | |
| 384 | |
| 385 | |
| 386 | |
| 387 | |
| 388 | |
| 389 | Skeagh (R392) - Kilbeggan (N6/N52) |
| 390 | Mullingar - Athlone (N55) |
| 391 | R390 - Clara |
| 392 | Mullingar (R390) - Lanesborough |
| 393 | Mullingar - Longford |
| 394 | Mullingar - Kilcogy |
| 395 | Delvin - Edgeworthstown |
| 396 | Coole - Granard (R194) |
| 397 | Ballymahon (R392) - Longford (N63) |
| 398 | Link R392 - R397 |
| 399 | Colehill (R393) - Taghshinny (N55) |
| 400 | Cushina - Mullingar |
| 401 | Kinnegad - Kildare |
| 402 | Innfield - R420 |
| 403 | Lucan - Carbury |
| 404 | Leixlip - Celbridge (R403) |
| 405 | Newcastle - Maynooth |
| 406 | Maynooth - Straffan (R403) |
| 407 | Kilcock - Naas |
| 408 | Maynooth - Mainham |
| 409 | Naas - Blackwood |
| 410 | Blessington - Naas |
| 411 | Naas - Hollywood (N81) |
| 412 | Naas (R448) - N81 |
| 413 | Ballymore Eustace - Kildare |
| 414 | Allenwood - Monasterevin |
| 415 | Allenwood - Kildare - Crookstown |
| 416 | Milltown - Kineagh |
| 417 | Monasterevin - Carlow |
| 418 | Athy - Tullow |
| 419 | Rathangan - Ballydavis (M7) |
| 420 | Jamestown - Tullamore |
| 421 | Tullamore - Roscrea |
| 422 | Emo (N7) - Castlecuffe (R421) |
| 423 | Portarlington - Mountmellick |
| 424 | Monasterevin - Lea |
| 425 | Ballydavis - Abbeyleix |
| 426 | Portlaoise - Castlecomer |
| 427 | R417 - Cashel |
| 428 | Athy - Stradbally |
| 429 | Maganey - Ballickmoyler |
| 430 | Carlow - Abbeyleix - Mountrath |
| 431 | R430 - Railyard (N78) |
| 432 | Abbeyleix - Ballyragget |
| 433 | Abbeyleix - Templemore |
| 434 | Durrow - Borris in Ossory (N7) |
| 435 | Borris in Ossory - Johnstown - R693 |
| 436 | Kilbeggan - Ferbane |
| 437 | Kilcormac - Ferbane |
| 438 | Cloghan (R356) - Borrisokane |
| 439 | Birr - Banagher |
| 440 | Mountrath - Birr |
| 441 | Edenderry - Rhode |
| 442 | Clonbulloge - Bracknagh |
| 443 | Ring Tullamore West |
| 444 | Moate (N6) - Shannonbridge |
| 445 | Johnstown - Newbridge / Ballydavis - Portlaoise / in Roscrea / N7 - Nenagh (N52) / Annacotty (N7) - Limerick - Ferndale (N18) | former N7 |
| 446 | former N6 Athlone / Loughrea |
| 447 | |
| 448 | Naas - Kilcullen (M9) | former N9 |
| 449 | |
| 450 | |
| 451 | |
| 452 | |
| 453 | |
| 454 | |
| 455 | |
| 456 | |
| 457 | |
| 458 | Barefield (N18) - Ennis - Hurlers Cross (N18) | former N18 |
| 459 | Doolin (R479) - Ferry |
| 460 | Gort - Milltown Malbay |
| 461 | Gort (N18) - Scarriff |
| 462 | Gort (N18) - Cratloe |
| 463 | Tuamgraney - Limerick |
| 464 | Parteen - Limerick (N18) |
| 465 | Bodyke - Parteen (R463) |
| 466 | Tulla - Birdhill |
| 467 | R352 - Callaghansmills (R466) |
| 468 | Feakle - R352 |
| 469 | Ennis - Kilmurry |
| 470 | Sixmilebridge - Newmarket on Fergus |
| 471 | Cloonlara - Hurlers Cross |
| 472 | Shannon - Newmarket on Fergus |
| 473 | Clarecastle - Kilrush |
| 474 | Ennis - Milltown Malbay |
| 475 | St. Flannan's Road, Ennis (N18 - N68) |
| 476 | Fountain Cross - Lisdoonvarna |
| 477 | Ballyvaughan - Lisdoonvarna |
| 478 | Lisdoonvarna - Lahinch |
| 479 | R477 - Doolin (R478) |
| 480 | Ballyvaughan - Leamaneh Castle |
| 481 | Kilfenora - Ennistimon (N67) |
| 482 | N67 - Spanish Point (N67) |
| 483 | Kilmurry (N67) - Kilrush |
| 484 | Knockalough - Creegh - N67 |
| 485 | N68 - Kilmurry McMahon |
| 486 | Kilmurry McMahon (R473) - Killimer (N67) |
| 487 | Kilkee - Loop Head |
| 488 | Breaghva - Carrigaholt |
| 489 | Riverstown - Portland |
| 490 | Moneygall - Borrisokane |
| 491 | Roscrea - Nenagh (N7) |
| 492 | Shinrone - Sharavogue |
| 493 | Carrigahorig - Nenagh (N52) |
| 494 | Nenagh - Birdhill |
| 495 | Dromineer - Nenagh |
| 496 | Bushfield (N7) - Ballina |
| 497 | Nenagh - Tipperary |
| 498 | Thurles - Nenagh |
| 499 | Toomyvara - Bushfield |
| 500 | Nenagh (R497) - Silvermines |
| 501 | Templemore - Borrisoleigh |
| 502 | Johnstown - Templemore |
| 503 | Thurles - Lisnagry |
| 504 | Birdhill - Newport (R503) |
| 505 | Cashel - Brittas (N24) |
| 506 | Cappamore - Lisnagry |
| 507 | Doon - Oola (N24) |
| 508 | |
| 509 | Ring Limerick south |
| 510 | Link N20 - N69 in Limerick |
| 511 | Limerick - R516 |
| 512 | Limerick - Fermoy |
| 513 | N24 - Mitchelstown |
| 514 | R512 - Herbertstown |
| 515 | Tipperary - N21 |
| 516 | Croom - Emly |
| 517 | Blackpool - Mitchelstown (R513) |
| 518 | Askeaton - Kilmallock |
| 519 | Adare - Dromcolliher |
| 520 | R518 - Newcastle West |
| 521 | Foynes (N69) - Newcastle West |
| 522 | Newcastle West - N73 |
| 523 | Rathkeale - Listowel (N69) |
| 524 | Glin - Abbeyfeale |
| 525 | O'Briensbridge - Castleconnell |
| 526 | Limerick - Patrickswell | former N20 |
| 527 | Limerick - N7/N20 | former N24 inside ring road |
| 528 | |
| 529 | |
| 530 | |
| 531 | |
| 532 | |
| 533 | |
| 534 | |
| 535 | |
| 536 | |
| 537 | |
| 538 | |
| 539 | |
| 540 | |
| 541 | |
| 542 | |
| 543 | |
| 544 | |
| 545 | |
| 546 | |
| 547 | |
| 548 | |
| 549 | Murreagh (R559) - Glashabeg - Dingle (N86) |
| 550 | Dingle (N86) - Brandon Point |
| 551 | Tarbert - Tralee |
| 552 | Ballylongford - Listowel |
| 553 | Listowel - Ballybunnion |
| 554 | Lisselton - R551 |
| 555 | Abbeyfeale - Listowel |
| 556 | Ballyduff (R551) - Tralee |
| 557 | Listowel (N69) - Abbeydorney |
| 558 | Tralee (R551) - Fenit |
| 559 | Dingle (R549) - Murreagh - Dingle |
| 560 | Camp (N86) - Stradbally - Ballyduff (R550) |
| 561 | Farranfore - Anascaul |
| 562 | Killarney - Killorglin | changed to N72 |
| 563 | Aghadoe - Milltown |
| 564 | Glenbeigh (N70) - Ross-Behy |
| 565 | N70 - Knight's Town |
| 566 | N70 - Ballinskelligs |
| 567 | Link N70 - R566 |
| 568 | Moll's Gap - Sneem |
| 569 | Cloonken (N22) - Kenmare |
| 570 | Barraduff - Glenflesk |
| 571 | Kenmare - Castletown Bearhaven |
| 572 | Glengarriff - Ballaghboy |
| 573 | Ardea - Lauragh |
| 574 | Lauragh - Adrigole |
| 575 | Eyeries - Cahermore |
| 576 | N72 - Kilkinlea |
| 577 | Cloonbannin - Castleisland |
| 578 | Newtownshandrum - Ballydesmond |
| 579 | Broadford - Carrigrohane |
| 580 | Buttevant - Kanturk |
| 581 | Doneraile - New Twopothouse |
| 582 | Ballydesmond - Macroom |
| 583 | Cloonbannin (N72) - Millstreet |
| 584 | Macroom - Ballylickey |
| 585 | Farnanes (N22) - Kealkill |
| 586 | Bandon - Bantry (N71) |
| 587 | R584 - Dunmanway |
| 588 | Cappeen - Clonakilty |
| 589 | N71 - Bandon |
| 590 | Kilpatrick - Crookstown (N22) |
| 591 | Bantry (N71) - Crookhaven |
| 592 | Ballydehob - Toormore |
| 593 | Drimoleague - Skibbereen |
| 594 | Derreeny Bridge - Aghaville |
| 595 | Skibbereen - Baltimore |
| 596 | Skibbereen - Castletownshend |
| 597 | Rosscarbery - Leap |
| 598 | Lissavaird - Rosscarbery (N71) |
| 599 | Clonakilty (N71) - Dunmanway |
| 600 | Cork - Clonakilty |
| 601 | Timoleague - Courtmacsherry |
| 602 | N71 - Timoleague |
| 603 | Bandon - R600 |
| 604 | Ballinspittle - R600 |
| 605 | Kinsale - Inishannon |
| 606 | Kinsale - Dunderrow |
| 607 | Halfway - Kinsale |
| 608 | Cork - Ovens (N22) |
| 609 | Douglas - Donnybrook - N28 (south) |
| 610 | Cork - Monkstown - N28 |
| 611 | N28 - Carrigaline - Belgooly |
| 612 | Carrigaline - Crosshaven - Ballinluska - Carrigaline |
| 613 | Ringaskiddy - Ballinhassig |
| 614 | Rathcormack - Cork |
| 615 | Sallybrook - Mayfield |
| 616 | Watergrasshill (R639) - White's Cross (R614) |
| 617 | Blarney (N20) - Tower |
| 618 | Carrigrohane - Macroom |
| 619 | Mallow - Farnanes Cross Roads |
| 620 | Mallow - Drommahane |
| 621 | N72 - Drommahane |
| 622 | Cloghroe - Inishcarra |
| 623 | Little Island (N25) - Wallingstown (N8/N25) |
| 624 | Carrigtohill (N25) - Cobh |
| 625 | formerly Carrigtohill - R624 |
| 626 | Rathcormack - Midleton |
| 627 | Tallow - Midleton |
| 628 | Tallow - Rathcormack |
| 629 | Midleton - Ballycotton |
| 630 | Ballynacorra - Whitegate |
| 631 | Cloyne - Saleen |
| 632 | Castlemartyr - Shanagarry |
| 633 | Youghal (N25) - Ladysbridge |
| 634 | Tallowbridge - Youghal |
| 635 | Tivoli - Blackpool |
| 636 | |
| 637 | R586 - Skibbereen |
| 638 | Quartertown (R619) - Gooldshill - N20 |
| 639 | Kilworth (M8) - Fermoy - Watergrasshill - Glanmire - Dunkettle (N8) | former N8 |
| 640 | |
| 641 | |
| 642 | |
| 643 | |
| 644 | |
| 645 | |
| 646 | |
| 647 | |
| 648 | |
| 649 | |
| 650 | |
| 651 | |
| 652 | |
| 653 | |
| 654 | |
| 655 | |
| 656 | |
| 657 | |
| 658 | |
| 659 | Thurles - Holy Cross |
| 660 | Thurles - Cashel |
| 661 | Holy Cross - Tipperary |
| 662 | Tipperary - R513 |
| 663 | Bansha - Garryspillane |
| 664 | Tipperary - Newtown |
| 665 | Clonmel - Mitchelstown |
| 666 | Lismore (N72) - Fermoy |
| 667 | R666 - Kilworth |
| 668 | Caher - Lismore (N72) |
| 669 | Cappoquin - R668 |
| 670 | Ardfinnan - Caher - Cloghabreedy (N8) |
| 671 | Clonmel - Kinsalebeg (N25) |
| 672 | Ballymacarbry (R671) - Dungarvan |
| 673 | N25 - Ardmore - N25 |
| 674 | N25 - Ringville |
| 675 | Waterford - Dungarvan |
| 676 | Carrick-on-Suir - Lemybrien |
| 677 | Carrick-on-Suir (R676) - Bunmahon (R675) |
| 678 | Portlaw - Clonmel |
| 679 | |
| 680 | Kilmeadan - Clonmel |
| 681 | N25 - Bunmahon (R675) |
| 682 | N25 - Tramore |
| 683 | Waterford - Passage East |
| 684 | Knockboy - Dunmore East |
| 685 | R682 - Kilmacomb |
| 686 | Ring Waterford West |
| 687 | Rathkeevin - Newinn |
| 688 | Cashel - Clonmel |
| 689 | Urlingford - Clonmel |
| 690 | Urlingford (R689) - Ninemilehouse |
| 691 | Ballymack - Cashel |
| 692 | N76 - Cashel |
| 693 | Kilkenny - Urlingford |
| 694 | Castlecomer - Freshford |
| 695 | Kilkenny - Callan |
| 696 | Carrick-on-Suir - N76 |
| 697 | Kilkenny - Carrick-on-Suir |
| 698 | Callan - Piltown |
| 699 | Knocktopher - Callan |
| 700 | Kilkenny - New Ross |
| 701 | Newmarket (R699) - Kilmaganny |
| 702 | Enniscorthy - Coolgrange |
| 703 | Ballymurphy - Thomastown |
| 704 | Rosbercon - Mullinavat |
| 705 | Leighlinbridge - Mount Garret |
| 706 | Fethard - Kilsheelan (N24) |
| 707 | |
| 708 | Waterford - Clohernagh |
| 709 | Ring Waterford South |
| 710 | Waterford Outer Ring Road |
| 711 | |
| 712 | |
| 713 | |
| 714 | |
| 715 | |
| 716 | |
| 717 | |
| 718 | |
| 719 | |
| 720 | |
| 721 | |
| 722 | |
| 723 | |
| 724 | Kildavin - Royaloak |
| 725 | Shillelagh - Carlow |
| 726 | Rathvilly (N81) - Carlow |
| 727 | Hacketstown - R726 |
| 728 | |
| 729 | Borris - R731 |
| 730 | Kiltealy - Wexford - Drinagh |
| 731 | Killann - New Ross (N30) |
| 732 | New Ross eastern bypass | changed to N30 |
| 733 | New Ross - Wexford |
| 734 | Ballinteskin - Fethard |
| 735 | Clonroche (N30) - Dunmain |
| 736 | Ballynabola - Rosslare |
| 737 | R733 - Duncannon |
| 738 | N25 - Bridgetown (R736) |
| 739 | N25 - Kilmore Quay |
| 740 | Killinick - Rosslare (N25) |
| 741 | Gorey - Wexford |
| 742 | Gorey - Castlebridge (R741) |
| 743 | Curracloe - coast |
| 744 | Enniscorthy - Blackwater |
| 745 | Ferns - Ballindaggan (R702) |
| 746 | Carnew (R725) - Kiltealy (R702) |
| 747 | Arklow - Ballitore |
| 748 | Tinahely (R747) - Carnew |
| 749 | Tinahely - Shillelagh |
| 750 | Rathnew - Arklow |
| 751 | Wicklow - N11 |
| 752 | Rathnew - Woodenbridge |
| 753 | Rathdrum (R752) - Aughrim |
| 754 | Ballinacor - Avoca |
| 755 | Kilmacanoge - Rathdrum |
| 756 | Dunlavin - Laragh |
| 757 | R756 - Glendalough |
| 758 | Blessington (N81) - Granabeg (R756) |
| 759 | N81 - Sraghmore |
| 760 | Enniskerry - Killough |
| 761 | Bray - Rathnew |
| 762 | Greystones - N11 |
| 763 | Annamoe - Ashford |
| 764 | Roundwood - Ashford |
| 765 | Newtown Mount Kennedy - Roundwood |
| 766 | Bray - R761 |
| 767 | Bray - N11 |
| 768 | Kilbride - Newcourt |
| 769 | Wexford - junction N11/N25 |
| 770 | Arthurstown - Ballyhack |
| 771 | |
| 772 | Newtown Mount Kennedy / Arklow | former N11 |
| 773 | |
| 774 | |
| 775 | |
| 776 | |
| 777 | |
| 778 | |
| 779 | |
| 780 | |
| 781 | |
| 782 | |
| 783 | |
| 784 | |
| 785 | |
| 786 | |
| 787 | |
| 788 | |
| 789 | |
| 790 | |
| 791 | |
| 792 | |
| 793 | |
| 794 | |
| 795 | |
| 796 | |
| 797 | |
| 798 | |
| 799 | |
| 800 | |
| 801 | Dublin: Custom House Quay (R105) - North Wall (R131) |
| 802 | Dublin: Townsend Street (N11) - Sandwith Street (R815) |
| 803 | Dublin: Parnell Street | |
| 804 | Dublin: Bolton Street (N1) - North King Street |
| 805 | |
| 806 | |
| 807 | |
| 808 | |
| 809 | |
| 810 | Dublin - Walkinstown (R110) |
| 811 | |
| 812 | |
| 813 | Dublin: City Quay (R105) - Macken Street (R815) | former R105 |
| 814 | |
| 815 | Dublin: Lincoln Place (N11) - Lansdowne (R118) |
| 816 | Dublin: Lower Baggott Street (N11) - Pembroke Road - Ballsbridge (R118) |
| 817 | |
| 818 | |
| 819 | Walkinstown - Tallaght |
| 820 | |
| 821 | |
| 822 | Ballyboden - Ballinteer (R113) |
| 823 | Ballyboden - Knocklyon | changed to R133 |
| 824 | |
| 825 | Goatstown - Stillorgan - Blackrock |
| 826 | |
| 827 | Blackrock - Cabinteely |
| 828 | |
| 829 | Monkstown (R119) - Kill Of The Grange |
| 830 | Dean's Grange (N11) - Dun Laoghaire |
| 831 | |
| 832 | Albert Road Lower/Upper, Dun Laoghaire (R119 - R118) |
| 833 | |
| 834 | |
| 835 | |
| 836 | |
| 837 | |
| 838 | |
| 839 | |
| 840 | |
| 841 | |
| 842 | |
| 843 | |
| 844 | |
| 845 | |
| 846 | |
| 847 | |
| 848 | |
| 849 | |
| 850 | |
| 851 | Cork - Donnybrook |
| 852 | Mahon - N25 |
| 853 | |
| 854 | |
| 855 | |
| 856 | |
| 857 | Limerick: Ennis Road (R526 - R445) | former N18 |
| 858 | Limerick: Kilallee (R445) - Colbert Station - Dooradoyle (R526) |
| 859 | |
| 860 | Waterford: Clock Tower (N25) - Quarrymount |
| 861 | Waterford - west (R686) |
| 862 | |
| 863 | Galway - Newcastle |
| 864 | Newcastle (N59) - Salthill |
| 865 | Ring Galway East |
| 866 | Galway - N6 |
| 867 | |
| 868 | |
| 869 | Letterkenny: N56 - R250 |
| 870 | |
| 871 | Gort Road, Ennis (R352 - N18) |
| 872 | |
| 873 | |
| 874 | |
| 875 | |
| 876 | |
| 877 | |
| 878 | |
| 879 | |
| 880 | |
| 881 | |
| 882 | |
| 883 | |
| 884 | |
| 885 | |
| 886 | |
| 887 | Kilkenny: R695 - Station - Castle |
| 888 | |
| 889 | |
| 890 | |
| 891 | |
| 892 | |
| 893 | |
| 894 | |
| 895 | |
| 896 | |
| 897 | |
| 898 | |
| 899 | |
| 909 | Kilkenny - southwest (N76) |
| 910 | Kilkenny - south (N10/N76) |
| 921 | Link N6 - R338 (Galway) |
| 925 | Donegal - N56 |
| 926 | Dooradoyle - N20 |