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. The elevated expressway was planned as a part of Tokyo's post-war redevelopment before the 1964 Summer Olympics. As a radial route, it travels southwest from its eastern terminus at the Inner Circular Route, Tokyo's innermost ring road in Meguro, to the eastern terminus of the Tōmei Expressway in Setagaya. Route description The Shibuya Route runs southwest from Tanimachi Junction where it meets the Inner Circular Route, Tokyo's innermost beltway, in Minato. In all, it runs for through the wards of Shibuya, Meguro, and Setagaya. The expressway, an elevated highway, is paralleled by various surface-level streets along its entire length, primarily National Route 246. Tokyu Corporation's commuter line, the Tōkyū Den-en-toshi Line, travels directly beneath the expressway from Ikejiri-Ōhashi Station to Komazawa-daigaku Station. The foundation of the supports for this section of the elevated expressway is the tunnel that carries the commuter line, so the tunnels are maintained jointly by the Metropolitan Expressway Company and the Tokyu Corporation. At Takagichō the expressway curves to the west, passing to the south of Aoyama Gakuin University. The Shibuya curves to the southwest once again as it passes central Shibuya. Continuing southwest into Meguro, the expressway begins its run directly above the Tōkyū Den-en-toshi Line. Along this section, the expressway has a junction with the Central Circular Route at Ōhashi Junction. The route then passes into Setagaya. In the ward the expressway has a junction with surface-level National Route 246. The Shibuya Route comes to an end at the Yōga entrance/exit where the expressway transitions to the intercity Tōmei Expressway managed by the Central Nippon Expressway Company. The Shibuya Route, along with the Tōmei Expressway and the Inner Circular Route at its ends, is included in the cross-continental Asian Highway 1 that runs from Tokyo to Istanbul. History The first plans were laid out for the Shibuya Route on 18 August 1959 during the preparations for the 1964 Summer Olympics to be held in Tokyo. It was one of a network of eight expressway routes "designed to allow 60,000 vehicles travelling at 60kmper hour" planned to span Tokyo upon completion. The estimated cost for the entire project as laid out in 1959 was 105.8