Russian federal highways (Russian: автомобильные дороги федерального значения Российской Федерации, romanized: avtomobil’nyye dorogi federal’nogo znacheniya Rossiyskoy Federatsii; lit. highways of federal importance of the Russian Federation) are the most important highways in Russia that are federal property. The following motorways are designated as federal.[1][2]
All highways
that connect Moscow with the capitals of the neighbouring countries and with the administrative centres of the subjects of the Russian Federation. They are identified by the prefix "M" in the national route signs;
that are parts of the international road networks: European and Asian, identified by prefixes "E" and "AH" in the international route signs used simultaneously with the national route signs.
Some highways
that connect administrative centers of the subjects of the Russian Federation with each other (national route sign prefix "P," which is the Cyrillic "R")
that are branching and bridging roads (national prefix "A"):
access roads that lead to major transportation nodes and special objects
access roads from the administrative centers of the subjects of the Russian Federation which has no highway connection with Moscow to the nearest sea and river ports and to the international borders.