The Washington Metropolitan Area Transit Authority (WMATA) in the US has announced plans to invest in a three-year project that will involve the reconstruction of outdoor platforms at 20 Metrorail stations.

The project is estimated to cost $300m-$400m and intended to address structural deficiencies after decades of exposure to the elements.

WMATA installed temporary upgrades at many of these stations in a bid to stabilise the platforms to ensure passenger safety until reconstruction takes place.

“The station platforms at Braddock Road, King Street and Eisenhower Avenue stations will be demolished and rebuilt.”

Legislatures in Virginia, Maryland and the District of Columbia approved dedicated capital funding for the project.

WMATA has already rebuilt platforms at ten of the system’s 45 outdoor stations. The authority spent around three years rebuilding the two most recently reconstructed platforms, at Minnesota Avenue and Deanwood stations.

In order to advance the reconstruction of the next 20 platforms, WMATA carried out extensive internal planning and consultation with construction contractors.

Platforms will demolished and rebuilt at Braddock Road, King Street and Eisenhower Avenue stations under the plan’s initial phase, starting next year.

Between September next year and May 2020, WMATA will also reconstruct the platforms at Van Dorn Street, Franconia-Springfield, Huntington, and Reagan National Airport.

The location and configuration of these stations will allow construction to take place when all rail stations remain open.

The remaining 13 station platforms to be reconstructed in 2020-2021 are West Hyattsville, College Park, Greenbelt, Rhode Island Avenue, Vienna, Dunn Loring, West Falls Church, East Falls Church, Cheverly, Landover, New Carrollton, Addison Road, and Arlington Cemetery.

Service plans for these stations are being developed, including possible coordination with construction activity associated with the Purple Line in Maryland and the widening of I-66 in Virginia.