Shortly before the 1964 Summer Olympics, an expressway was built over the Nihonbashi bridge, obscuring the classic view of Mount Fuji from the bridge. In recent years, local citizens have petitioned the government to move this expressway underground. This plan was endorsed by Prime Minister Junichiro Koizumi in 2005, and the Tokyo Metropolitan Government and Ministry of Land, Infrastructure, Transport and Tourism announced in 2017 that they would begin a detailed study of the project, with a goal of beginning construction following the 2020 Summer Olympics in Tokyo. If implemented, the construction costs are expected to total ¥500 billion (about US$4+ billion).