The , signed as Route 3 of the Shuto Expressway system and AH1 as a part of that route of the Asian Highway Network, is one of the radial routes of the tolled Shuto Expressway system in the Tokyo area.
In the Tokyo region, one of the key roads is the , signed as Route 3 of the Shuto Expressway system and AH1 as part of that route of the Asian Highway Network, which is a component of the tolled Shuto Expressway system's radial routes.