Updated at 8:45 a.m.

Normal service has resumed on Metro’s busy Red Line. And Metro said normal service has resumed on the Blue, Orange and Silver lines. There was an earlier power problem that caused trains on those lines to share a track.

An entire hour late for work thanks to the negligence of @WMATA — joy. (@CrownHerQueen) November 18, 2014

After 11 min wait, 2 OL trains arrive at the same time at Vienna. #wmata absolutely sucks. pic.twitter.com/AocwSzbMo6 — dcmetrosucks (@dcmetrosucks) November 18, 2014

@wmata the past two days on the Orange/Silver/Blue lines has been the poorest service I can remember. #WMATA is the WORST. — John Williams (@WilliamsJK2) November 18, 2014

Updated at 8:05 a.m.

Tuesday is turning into a rough commute for Metro riders. The transit agency said riders on the Red Line should expect delays.

There is a signal problem outside the Silver Spring station. Riders should expect delays in the direction of Shady Grove.

The problem comes after earlier issues on the Blue, Orange and Silver lines.

Updated at 7:38 a.m.

Trains are no longer sharing a track but delays continue on three of Metro’s rail lines Tuesday morning. About 7:30 a.m., Metro told riders to expect “significant delays” of more than 30 minutes Tuesday morning on the Orange, Blue and Silver lines because of a power problem near the Potomac Avenue station.

Trains were briefly sharing a track between the Stadium Armory and Eastern Market stations. In an e-mail, Metro said to “consider alternate travel options.”

At 7:38 a.m., Metro spokesman Dan Stessel said there was a “loss of third rail power on the westbound track” in the area of the Potomac Avenue stop.

He said two trains “were in that section when the power was lost.” Just before 7:45 a.m., the power had been restored and “both trains were on the move,” Stessel said. He said there were no injuries and no evacuations. Fire and police personnel were on the scene.

He said the cause of the power failure is “yet to be determined.”

Riders voiced their thoughts —

2 days in a row @wmata power issues at stations. Deviation for morning commute is +/- 40mins. @NYCSubwayLine more complex yet more efficient — Quantslayer (@tradesbeta) November 18, 2014

After waiting 20 mins @ WFC, we are finally on the move... 40+ mins to go 3 stations #wmata — Vinh (@mcvin27) November 18, 2014

Original posting at 6:57 a.m.

Metro riders should expect delays on the Blue Line Tuesday morning.

The problem is due to an earlier train malfunction at the Largo Town Center stop, Metro said.

The delays are in the direction of Franconia.

For more transportation-related news, click here.