The Moscow Big Ring Road (), designated as A108, is a Russian federal highway with a length of .
It is located in the Moscow, Kaluga and Vladimir Oblasts, passing through the cities of Orekhovo-Zuyevo, Likino-Dulyovo, Kurovskoye, Voskresensk, Balabanovo, Ruza, Klin and Dmitrov. The highway forms a large transport circle, in the center of which is Moscow.