| County Route 504 (New Jersey) | County Route 505 | County Route 505 (California) |
| County Route 505 (New Jersey) | County Route 505 Truck (New Jersey) | County Route 506 (New Jersey) |
| County Route 506 Spur (New Jersey) | County Route 507 | County Route 507 (New Jersey) |
| County Route 508 (New Jersey) | County Route 508 Spur (New Jersey) | County Route 509 (New Jersey) |
| County Route 509 Spur (New Jersey) | County Route 50A (Oneida County, New York) | County Route 50A (Suffolk County, New York) |
| County Route 50B (Suffolk County, New York) | County Route 50C (Suffolk County, New York) | County Route 51 (Bergen County, New Jersey) |
| County Route 51 (Cayuga County, New York) | County Route 51 (Dutchess County, New York) | County Route 51 (Erie County, New York) |
| County Route 51 (Essex County, New York) | County Route 51 (Franklin County, New York) | County Route 51 (Greene County, New York) |
| County Route 51 (Herkimer County, New York) | County Route 51 (Madison County, New York) | County Route 51 (Monmouth County, New Jersey) |
| County Route 51 (Oneida County, New York) | County Route 51 (Orange County, New York) | County Route 51 (Putnam County, New York) |
| County Route 51 (Rensselaer County, New York) | County Route 51 (Rockland County, New York) | County Route 51 (Saratoga County, New York) |
| County Route 51 (Schoharie County, New York) | County Route 51 (Suffolk County, New York) | County Route 51 (Sullivan County, New York) |
| County Route 51 (Ulster County, New York) | County Route 510 (New Jersey) | County Route 511 |
| County Route 511 (New Jersey) | County Route 511 Alternate (New Jersey) | County Route 512 (New Jersey) |
| County Route 513 (New Jersey) | County Route 514 (New Jersey) | County Route 514 Spur (Middlesex County, New Jersey) |
| County Route 514 Spur (New Jersey) | County Route 515 | County Route 515 (California) |
| County Route 515 (New Jersey) | County Route 516 (New Jersey) | County Route 516 Alternate (New Jersey) |
| County Route 516 Spur (New Jersey) | County Route 517 | County Route 517 (New Jersey) |
| County Route 518 (New Jersey) | County Route 518 Spur (New Jersey) | County Route 519 (New Jersey) |
| County Route 519 Spur (New Jersey) | County Route 52 (Albany County, New York) | County Route 52 (Chautauqua County, New York) |
| County Route 52 (Dutchess County, New York) | County Route 52 (Franklin County, New York) | County Route 52 (Jefferson County, New York) |
| County Route 52 (Madison County, New York) | County Route 52 (Monmouth County, New Jersey) | County Route 52 (Monroe County, New York) |
| County Route 52 (Montgomery County, New York) | County Route 52 (Niagara County, New York) | County Route 52 (Orleans County, New York) |
| County Route 52 (Otsego County, New York) | County Route 52 (Rensselaer County, New York) | County Route 52 (Rockland County, New York) |
| County Route 52 (Saratoga County, New York) | County Route 52 (St. Lawrence County, New York) | County Route 52 (Steuben County, New York) |
| County Route 52 (Suffolk County, New York) | County Route 52 (Sullivan County, New York) | County Route 52 (Ulster County, New York) |
| County Route 52 (Westchester County, New York) | County Route 520 (New Jersey) | County Route 521 (New Jersey) |
| County Route 522 (New Jersey) | County Route 523 (Erie County, New York) | County Route 523 (New Jersey) |
| County Route 524 (Erie County, New York) | County Route 524 (New Jersey) | County Route 524 Alternate (New Jersey) |
| County Route 524 Spur (New Jersey) | County Route 524A (%county% County, New Jersey) | County Route 524A (New Jersey) |
| County Route 525 (New Jersey) | County Route 526 (New Jersey) | County Route 526 Alternate (New Jersey) |
| County Route 526 Spur (New Jersey) | County Route 527 (Erie County, New York) | County Route 527 (New Jersey) |
| County Route 527 Alternate (New Jersey) | County Route 527A (%county% County, New Jersey) | County Route 527A (New Jersey) |
| County Route 528 (Erie County, New York) | County Route 528 (New Jersey) | County Route 528 Truck (New Jersey) |
| County Route 529 (Erie County, New York) | County Route 529 (New Jersey) | County Route 53 (Bergen County, New Jersey) |
| County Route 53 (Cattaraugus County, New York) | County Route 53 (Chautauqua County, New York) | County Route 53 (Delaware County, New York) |
| County Route 53 (Dutchess County, New York) | County Route 53 (Franklin County, New York) | County Route 53 (Greene County, New York) |
| County Route 53 (Jefferson County, New York) | County Route 53 (Madison County, New York) | County Route 53 (Monmouth County, New Jersey) |
| County Route 53 (Monroe County, New York) | County Route 53 (Montgomery County, New York) | County Route 53 (Ocean County, New Jersey) |
| County Route 53 (Oneida County, New York) | County Route 53 (Onondaga County, New York) | County Route 53 (Orange County, New York) |
| County Route 53 (Orleans County, New York) | County Route 53 (Otsego County, New York) | County Route 53 (Putnam County, New York) |
| County Route 53 (Rensselaer County, New York) | County Route 53 (Rockland County, New York) | County Route 53 (Saratoga County, New York) |
| County Route 53 (Suffolk County, New York) | County Route 53 (Sullivan County, New York) | County Route 53 (Ulster County, New York) |
| County Route 53 (Warren County, New York) | County Route 53 (Westchester County, New York) | County Route 53 (Wyoming County, New York) |
| County Route 530 (New Jersey) | County Route 531 (Erie County, New York) | County Route 531 (New Jersey) |
| County Route 532 (New Jersey) | County Route 533 (New Jersey) | County Route 533 Bypass (New Jersey) |
| County Route 533 Spur (New Jersey) | County Route 533 SPUR (New Jersey) | County Route 534 (Erie County, New York) |
| County Route 534 (New Jersey) | County Route 535 (Erie County, New York) | County Route 535 (New Jersey) |
| County Route 536 (New Jersey) | County Route 536 Spur (New Jersey) | County Route 536 SPUR (New Jersey) |
| County Route 536A (%county% County, New Jersey) | County Route 536A (New Jersey) | County Route 537 (New Jersey) |
| County Route 537 Spur (New Jersey) | County Route 537 SPUR (New Jersey) | County Route 538 (New Jersey) |
| County Route 539 | County Route 539 (Erie County, New York) | County Route 539 (New Jersey) |
| County Route 539 Alternate (New Jersey) | County Route 53A (Onondaga County, New York) | County Route 53A (Ulster County, New York) |
| County Route 54 (Bergen County, New Jersey) | County Route 54 (Cayuga County, New York) | County Route 54 (Chautauqua County, New York) |
| County Route 54 (Chemung County, New York) | County Route 54 (Dutchess County, New York) | County Route 54 (Franklin County, New York) |
| County Route 54 (Jefferson County, New York) | County Route 54 (Lewis County, New York) | County Route 54 (Monmouth County, New Jersey) |
| County Route 54 (Orange County, New York) | County Route 54 (Oswego County, New York) | County Route 54 (Otsego County, New York) |
| County Route 54 (Putnam County, New York) | County Route 54 (Rensselaer County, New York) | County Route 54 (Saratoga County, New York) |
| County Route 54 (Schoharie County, New York) | County Route 54 (St. Lawrence County, New York) | County Route 54 (Suffolk County, New York) |
| County Route 54 (Tioga County, New York) | County Route 54 (Ulster County, New York) | County Route 54 (Washington County, New York) |
| County Route 54 (Westchester County, New York) | County Route 54 (Wyoming County, New York) | County Route 540 (New Jersey) |
| County Route 541 | County Route 541 (Erie County, New York) | County Route 541 (New Jersey) |
| County Route 541 Alternate (New Jersey) | County Route 541 Truck (New Jersey) | County Route 542 (New Jersey) |
| County Route 543 (Erie County, New York) | County Route 543 (New Jersey) | County Route 544 (New Jersey) |
| County Route 545 (New Jersey) | County Route 546 (Erie County, New York) | County Route 546 (New Jersey) |
| County Route 547 (Erie County, New York) | County Route 547 (New Jersey) | County Route 548 (Erie County, New York) |
| County Route 548 (New Jersey) | County Route 549 (New Jersey) | County Route 549 Spur (New Jersey) |
| County Route 549 SPUR (New Jersey) | County Route 55 (Bergen County, New Jersey) | County Route 55 (Cattaraugus County, New York) |
| County Route 55 (Chemung County, New York) | County Route 55 (Dutchess County, New York) | County Route 55 (Franklin County, New York) |
| County Route 55 (Herkimer County, New York) | County Route 55 (Lewis County, New York) | County Route 55 (Madison County, New York) |
| County Route 55 (Monmouth County, New Jersey) | County Route 55 (Niagara County, New York) | County Route 55 (Onondaga County, New York) |
| County Route 55 (Orange County, New York) | County Route 55 (Oswego County, New York) | County Route 55 (Otsego County, New York) |
| County Route 55 (Putnam County, New York) | County Route 55 (Rensselaer County, New York) | County Route 55 (Saratoga County, New York) |
| County Route 55 (Schoharie County, New York) | County Route 55 (St. Lawrence County, New York) | County Route 55 (Steuben County, New York) |
| County Route 55 (Suffolk County, New York) | County Route 55 (Sullivan County, New York) | County Route 55 (Warren County, New York) |
| County Route 550 (Erie County, New York) | County Route 550 (New Jersey) | County Route 550 Spur (New Jersey) |
| County Route 550 SPUR (New Jersey) | County Route 551 (Erie County, New York) | County Route 551 (New Jersey) |
| County Route 551 Spur (New Jersey) | County Route 551 SPUR (New Jersey) | County Route 552 (Erie County, New York) |
| County Route 552 (New Jersey) | County Route 552 Spur (New Jersey) | County Route 552 SPUR (New Jersey) |
| County Route 553 (Erie County, New York) | County Route 553 (New Jersey) | County Route 553 ALT (New Jersey) |
| County Route 553 Alternate (New Jersey) | County Route 554 (Erie County, New York) | County Route 554 (New Jersey) |
| County Route 555 (New Jersey) | County Route 557 (New Jersey) | County Route 557 Truck (New Jersey) |
| County Route 559 (Erie County, New York) | County Route 559 (New Jersey) | County Route 559 ALT (New Jersey) |
| County Route 559 Alternate (New Jersey) | County Route 559 Truck (New Jersey) | County Route 56 (Bergen County, New Jersey) |
| County Route 56 (Dutchess County, New York) | County Route 56 (Essex County, New York) | County Route 56 (Jefferson County, New York) |
| County Route 56 (Monmouth County, New Jersey) | County Route 56 (Montgomery County, New York) | County Route 56 (Niagara County, New York) |
| County Route 56 (Oneida County, New York) | County Route 56 (Onondaga County, New York) | County Route 56 (Oswego County, New York) |
| County Route 56 (Putnam County, New York) | County Route 56 (Rensselaer County, New York) | County Route 56 (Saratoga County, New York) |
| County Route 56 (Suffolk County, New York) | County Route 560 (Erie County, New York) | County Route 560 (New Jersey) |
| County Route 561 (New Jersey) | County Route 561 ALT (New Jersey) | County Route 561 Alternate (New Jersey) |
| County Route 561 Spur (New Jersey) | County Route 562 (Erie County, New York) | County Route 563 (Erie County, New York) |
| County Route 563 (New Jersey) | County Route 565 (New Jersey) | County Route 567 (New Jersey) |
| County Route 569 | County Route 569 (New Jersey) | County Route 57 (Bergen County, New Jersey) |
| County Route 57 (Cattaraugus County, New York) | County Route 57 (Chautauqua County, New York) | County Route 57 (Clinton County, New York) |
| County Route 57 (Dutchess County, New York) | County Route 57 (Erie County, New York) | County Route 57 (Jefferson County, New York) |
| County Route 57 (Monmouth County, New Jersey) | County Route 57 (Montgomery County, New York) | County Route 57 (Niagara County, New York) |
| County Route 57 (Onondaga County, New York) | County Route 57 (Oswego County, New York) | County Route 57 (Otsego County, New York) |
| County Route 57 (Putnam County, New York) | County Route 57 (Schoharie County, New York) | County Route 57 (Suffolk County, New York) |
| County Route 57 (Wyoming County, New York) | County Route 571 (Erie County, New York) | County Route 571 (New Jersey) |
| County Route 572 (Erie County, New York) | County Route 573 (Erie County, New York) | County Route 573 (New Jersey) |
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