JR Nambu Line Elevated Continuous Crossing Project (Project Completed)

The continuous three-dimensional intersection project is part of road development in urban areas. By elevating or burying railways at intersections with roads, it aims to eliminate numerous level crossings at once, thereby alleviating level crossing congestion and accidents, facilitating urban transportation, and promoting the integration of urban areas divided by railways.

Overview of the Project

This project is led by the Tokyo Metropolitan Government in collaboration with Inagi City and JR East, and involves the construction of an elevated crossing between Inada Tsutsumi Station and Fuchu Honmachi Station over a distance of approximately 4.3 kilometers, along with the development of side roads alongside the newly constructed elevated bridge.
Through this project, 15 level crossings will be removed, alleviating traffic congestion at these crossings and improving the safety of roads and railways. Additionally, it will promote the integration of areas that were previously separated by the railway, significantly contributing to Community Development along the line.

Method of Elevated Crossing

There are elevated and underground methods for continuous grade separation.
For the JR Nambu Line, an elevated method was adopted due to the presence of the Tamagawa Bridge and the undergrounding of the Inagi Ohashi Road.

Why is it being elevated?

Traffic flow can be improved

The level crossing will be removed, eliminating traffic congestion on Tsurukawa Road, Fuchu Road, and city roads.

Safety can be improved

There will be no more crossing accidents, allowing people, cars, and trains to pass safely.
The passage of emergency vehicles that protect lives and property will not be hindered.

Contributes to the development of the community

The urban area that was divided by the railway can be integrated.
In Inagi City, comprehensive community development can be achieved through the Land Readjustment Project around the station in line with this project.

Improvement of convenience can be achieved

The station is equipped with elevators, escalators, and multifunctional clean restrooms, making it comfortable for everyone to use.
The effective use of the completed elevated space will enhance the convenience of the area, including the establishment of stores.

Location and Progress of Ongoing Construction

• Location in Progress (PDF 1.5MB)
• How to Proceed with Construction (PDF 1.3MB)

Progress of the Project

In October 2005, the elevated construction of the first phase section, including Yanokuchi Station (from Kawasaki side to the east side of Inagi-Naganuma Station), was completed, and eight level crossings during this period were removed and abolished.
In the section where the elevation was completed (from the west side of Yanokuchi Station to the old Oshitate level crossing), a road with a width of 6 to 7.5 meters has also opened along the elevated track.
Additionally, around Yanokuchi Station, the space under the elevated track has been effectively utilized, with a bicycle parking lot and shops (Aiport Yanokuchi) opening up.

Since March 2006, construction has started on the second phase of the construction section (from Inagi-Naganuma Station east side to Minami-Tama Station west side), and in December 2011, the switch of the elevated bridge for the down line (towards Tachikawa) was completed.
In December 2013, the switch to the elevated bridge for the up line (towards Kawasaki) was implemented, completing the elevation of the entire line within the project section. Along with the eight level crossings in the first phase section, all fifteen level crossings within the project section have been eliminated.
Additionally, in June 2016, the north side road was fully opened to traffic.

Utilization Plan Under the Elevated Structure

As part of the elevated crossing project of the JR Nambu Line (from Inadazutsumi Station to Fuchu-Honmachi Station), a utilization plan for the space under the elevated tracks in the Inagi City section (from Yanokuchi Station to Minami-Tama Station) has been developed by Tokyo Metropolitan Government, JR, and Inagi City to ensure effective and appropriate use. Moving forward, the utilization of the space under the elevated tracks will be carried out based on this utilization plan.

• Utilization Plan Under the Elevated Structure 1 (PDF 1.7MB)
• Utilization Plan Under the Elevated Structure 2 (PDF 2.1MB)

Background of the Project

• April, 1989 - Ministry of Construction (now the Ministry of Land, Infrastructure, Transport and Tourism) project adoption
• January 1992: Urban Planning Decision (Tokyo Metropolitan Notification No. 1, Kanagawa Prefecture Notification No. 3)
• January 1992 - Decision on Urban Planning for Access Roads (Inagi City Notification No. 1)
• March 1993 - Business Approval (Ministry of Construction Notification No. 620)
• January 1997, Construction commenced (Phase 1 construction section from Kawasaki side to the east side of Inagi-Naganuma Station)
• October 2005, Completion of the first phase of construction and removal of 8 level crossings
• March 2006, Start of construction for the second phase of the implementation section (from the east side of Inagi-Naganuma Station to the west side of Minami-Tama Station)
• March 2007 - Opening of the temporary station building at Inagi-Naganuma Station
• June 2008 Temporary Line Switch (Kawasaki Direction)
• October 2009 - Temporary Line Switch (Tachikawa Direction)
• December 2011 - Switch to the elevated down line (Tachikawa direction)
• December 2013 - Elevated Line Switch (Kawasaki Direction)
• March 2015: Completion of the 2 platforms and 4 tracks at Inagi-Naganuma Station
• March 2016 - Project Completed