International E-road Network - Numbering System

Numbering System

The route numbering system is as follows:

• Reference roads and intermediate roads, called Class-A roads, have numbers 1-129.
  • They are either odd-numbered, going north-south, ordered with E1 in the west.
  • Or they are even-numbered, going west-east, ordered with the lowest in the north. There are exceptions.
• Branch, link and connecting roads, called Class-B roads, have three-digit numbers above 130.
• Reference roads are roads numbered 5-95 ending with 0 or 5 or having odd numbers 101-129. They generally go across Europe and are usually several thousand kilometres long.
  • North-south reference roads have numbers 5-95 terminating in the figure 5, or odd 101-129, and increasing from west to east.
  • East-west reference roads have two-digit numbers terminating in the figure 0 and increasing from north to south.
• Intermediate roads are roads numbered 1-99 that are not reference roads. They are usually considerably shorter than the reference roads. They have odd (north-south) or even (west-east) numbers between the numbers of the reference roads between which they are located.
• Class-B roads have three-digit numbers, the first digit being that of the nearest reference road to the north, the second digit being that of the nearest reference road to the west, and the third digit being a serial number.
• North-south Class-A roads located eastwards of road E 99 have three-digit odd numbers from 101 to 129. Other rules for Class-A roads above apply to these roads.
• Class-B roads located eastwards of E 101 have 3-digit numbers beginning with 0, from 001 to 099.