As part of the Columbus Day Weekend track rehabilitation program, Metro will replace four rail switches at the L'Enfant Plaza Metrorail station on the Green and Yellow lines. These four switches form a "double crossover," which is an intersection in the track where trains can switch from one track to another, depending on their destination and route. Before the rail switch can be replaced, Metro needs to conduct preliminary work on the rail switches in preparation for their removal.
In addition to the track maintenance work at L'Enfant Plaza on the Yellow and Green Lines, Metro will close the Yellow Line Bridge over the Potomac River to conduct an annual safety inspection and conduct track maintenance. This means that the Yellow Line will run only between the Huntington and Pentagon Metrorail stations.