Asian Highway Network - Numbering and Signage

Numbering and Signage

The project new highway route numbers begin with "AH", standing for "Asian Highway", followed by one, two or three digits. Single-digit route numbers from 1 to 9 are assigned to major Asian Highway routes which cross more than one subregion. Two- and three-digit route numbers are assigned to indicate the routes within subregions, including those connecting to neighbouring subregions, and self-contained highway routes within the participating countries.

The letters and numbers are printed in the Latin script and Arabic numerals. Similarly to the E-road network the Asian highway numbers may simply be added to existing signage. The highway routes with a single digit are supposed to cross the whole of Asia while three digit routes are used within a single region of the states - the routes with two digits are longer regional routes that may or may not cross state borders.

The actual design of the signs has not been standardized, only that the letters and digits are in white or black, but the color, shape and size of the sign being completely flexible. Most examples feature a blue rectangular shield with a white inscription (similar to German Autobahn signage) with further examples of white on green and black on white rectangular shields.