Iran | Area code 98 | Common abbreviation IR | Last updated 13-1-2008 | |||
| Road class | Syntax | Administrative subordination | Sub classes | Zones | System | Remarks |
| Asian highway | A[0-9]<2> | Asia | See Asia | |||
| National highway | [0-9]<1-2> | national | Grid | |||
| General description: odd numbers (11-99) generally denote north-south routes, while even numbers (12-98) denote east-west routes. Numbers increase in eastbound and southbound direction respectively. There are some A roads without a national number. Motorways do not have national numbers. | ||||||
| Road signs: blue on motorways, green on other roads. | ||||||
| History: Probably in the late 1990's, all road numbers were changed. The old system was also a grid, but with only 5 east-west routes (even numbers 2-10) and only 7 north-south routes (odd numbers 1-13). Therefore the new system is a lot more dense, though there are a few sections that used to have a number which are not numbered anymore. | ||||||
Sources and links: various maps and atlases
Official sites: | ||||||