Nigeria | Area code 234 | Common abbreviation WAN | Last updated 2-11-2000 | |||
| Road class | Syntax explanation | Administrative subordination | Sub classes | Zones | System | Remarks |
| Expressway | E[1-9] | national | Only E1 | |||
| National road | A[0-9]<1-3>{-[1-9]} | national | A[1-4] | Grid | ||
| Other | ||||||
| Minor road | F[0-9]<3> | national | Defined by first digit | |||
| General description:
The only known expressway number is E1, which is the motorway parallel to the A1. There may be others.
The A1 - A4 are the main north-south routes, with A1 in the west and numbers increasing to the east. Routes Axyz are connections between Ax and Ay (with y=x+1), z increases to the north. For example, A125 and A126 are parallel connections between A1 and A2, A126 is north of A125. A5 - A13 and suffixed numbers are other connecting routes and connections between the A1 and the western border and between the A4 and the eastern border. Few Minor roads are indicated on maps. Zones are defined by the first digit of all numbers | ||||||
| Road signs: no information available | ||||||
| History: The old system, which had 1- to 3-digit numbers with sub classes defined by number of digits, was changed to the current system around 1970. | ||||||
| Sources: various maps | ||||||