Metro says weekend work will affect the orange, red, yellow and green lines.
Metro trains will share a track along portions of four of the system’s five lines this weekend.
Metro is planning track work on the red, blue and green lines this weekend, and the agency says customers should add up to 30 minutes to their travel times because of the work.
Three Metro Green Line stations will be closed through the end of the day Monday for construction and maintenance.
Metro is closing three stations on the yellow and green line for maintenance work over the Columbus Day weekend.