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Europe has a system of European routes that are numbered E1 and up. They cross national borders and are the responsibility of the United Nations Economic Commission for Europe (UNECE). E routes are somewhat similar to the interstate highway system of the United States.

1 Numbering system

The route numbering system, defined by UNECE since 1975, went through a major change in 1992 and is now as follows (text and layout slightly modified from the original for clarity of understanding):

  1. Reference roads and intermediate roads, called Class-A roads, have two-digit numbers. Branch, link and connecting roads, called Class-B roads, have three-digit numbers.
  2. In general:
  3. North-south Class-A roads located eastwards of road E99 have three-digit odd numbers from 101 to 129. Other rules mentioned in paragraph 2 above apply to these roads.
  4. Class-B roads located eastwards of E101 have 3-digit numbers, beginning with 0, from 001 to 099.

1.1 Exceptions

Two Class-A roads, namely E47 and E55, remain signed by their pre- 1992 numbers, E6 and E4 respectively, within Sweden and Norway. These exceptions were granted because the expenses connected with re-signing these extremely long road portions would be too large. These roads are signed by their new numbers from Denmark and southward, though, as are other European routes within Scandinavia.

2 Class A roads

2.1 North-South reference



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