Metro says the red, orange and blue lines will be affected by work this weekend.
Metro says weekend work will only affect the red line over the Independence Day holiday weekend.
Passengers traveling on the orange, blue, and green lines will have to wait longer for Metro trains this weekend.
Metro says seven red line stations will be affected by weekend track work, with buses replacing trains on a portion of the line.
A Metro transit employee has been struck by a train at a rail yard in suburban Maryland.