Thread by @MetroReasons

It's apparently one of those days. No train movement in either direction at National Apt at the moment.
#wmata

https://twitter.com/Metrorailinfo/status/1206354921567608835

Service at National Apt has been halted since ~6:11pm. Trains on both tracks are stopped due to a power problem. Trains may offload/reverse prior to their destination. #wmata

At appx 6:12 a power issue disrupted all electronic signals at National Apt. #wmata operators have been instructed to clamp switches at National Airport and Braddock Rd to begin regaining train movement through the area. Delays continue to mount.

YL/BL
* Northbound service still suspended between Braddock and Crystal City
* Southbound service is "open" but very very few trains have gotten through.

Delays continue to grow.
#wmata

#wmata has been able to restore train traffic in both directions between Crystal City & Braddock Road.

Expect continuing delays as train speeds are limited through Pentagon City, National, and Braddock due to clamped switches.

https://twitter.com/WTOPtraffic/status/1206363755984097280

#wmata

A ~30-min service suspension and @Metrorailinfo's last tweet was 40 minutes ago. #wmata

Northbound arrivals at Crystal CIty
* 6:04pm then 6:40pm

Southbound arrivals at Braddock Rd:
* 6:13pm then 6:57pm
#delays #wmata #servicegap

All Yellow/Blue Line trips will take significantly longer than usual around Pentagon City to Braddock Road. #wmata is operating under restricted throughput rules limiting how closely trains can run. National-Braddock may take 2-3x as long as usual, for instance.

The type of power issue affecting signaling on the Yellow/Blue Lines @ National can potentially contribute to trains being misrouted at King St at the YL/BL junction due to "jumbled" data. Nothing's happened yet but the #wmata ROCC will need to keep an eye on it.