The Tokyo metropolitan government has presented a revised plan to extend the Tokyo Outer Loop Road, which puts most of the road underground rather than above ground. The 16 km extension begins in Nerima Ward and ends in Setagaya Ward. Nine kilometres between Nerima Ward and Mitaka, western Tokyo, would be constructed underground. The entire construction bill could amount to nearly ¥2 trillion.The 85 km Tokyo Outer Loop Road passes through Tokyo and three prefectures. The portion passing through Saitama Prefecture has already opened to traffic, while the portion passing through Chiba Prefecture is under construction. 45/02. The central government has signed an agreement with the Tokyo metropolitan government to build a 16 km underground motorway under Tokyo, beginning in Nerima and ending in Setagaya, one of the richest residential areas in central Tokyo. The new expressway, named Gaikando, will link the northwest areas of the capital to the southwest boroughs and will run at a depth of 40 m. TBM method to be used. Its cost is estimated at $9.6 billion. 03/03.The transport ministry and the Tokyo metropolitan government have agreed to build part of the Tokyo sector of the Gaikando expressway as a tunnel that will be more than 40 m underground. The planned tunnel will be 16 m in diameter. The Gaikando is a 86 km expressway running in a roughly 15 km radius of central Tokyo that will form the third circular expressway in the Tokyo metropolitan area.The underground plan covers one of the two Tokyo sectors, a 16 km stretch between Nerima Ward and Setagaya Ward. 12/03.