Trackbed lighting installation is prompting the closure of four Orange and Silver line stations in Arlington this weekend.

The Ballston, Virginia Square, Clarendon and Courthouse Metro stations will be closed Saturday and Sunday, WMATA says on its website.

Shuttle buses will run between East Falls Church and Rosslyn throughout the course of the weekend.

On either end of the Orange and Silver lines, trains will run every 12-15 minutes, as usual. At night, the last train on each of the Orange and Silver lines will run some 35-40 minutes earlier than usual, to accomodate shuttle schedules.