Metro trains single-tracked in three places during the Tuesday evening commute.
A track problem near the Woodley Park station forced single-tracking between the Dupont Circle and Van Ness stations after 5 p.m. Smoke was reported. That issue was resolved by 6 p.m.
Then another track problem was reported near the Van Ness station. Trains single-tracked between Van Ness and Friendship Heights. That was resolved about 7:15 p.m.
An earlier signal problem outside Largo Town Center caused single-tracking there. That issue was resolved by about 6:15 p.m.