Thread by @MetroReasons

#wmata Orange Line trains are single-tracking between Cheverly and New Carrollton. Delays possible in/around those stations.

This appears to be day #2 of unannounced single-tracking between Cheverly and New Carrollton for vegetation removal work around the tracks.
@Metrorailinfo #wmata

Additional delays @ Cheverly due to an interlocking (crossover) issue preventing the #wmata ROCC from remotely setting routes for trains to follow. A supervisor is on scene to manually crank/clamp switches so trains can move.

Orange Line riders, beware: select east-bound trains may offload @ Stadium-Armory and turn around before reaching New Carrollton due to this unannounced trackwork and a signal problem at Cheverly. #wmata

No, this is incorrect. Orange Line trains have been single-tracking between Cheverly and New Carrollton since before 8a this morning due to unannounced maintenance of way work. Trains are just now experiencing add'l delays due to a signal problem. #wmata

#wmata Orange Line trains continue to single-track without advance notice from @Metrorailinfo between Cheverly and New Carrollton due to vegetation removal around the tracks. Expect delays and note *very* poor schedule adherence.

#wmata's eastern Orange Line terminus (New Carrollton) has apparently missed 3 dispatches in just the last two hours, per @dcmetrohero, meaning these trains are not available to transport riders west towards Vienna.

...and, for unknown reason, @Metrorailinfo is also running fewer Silver Line than scheduled - about every 18 minutes, rather than the scheduled 12. #wmata

#wmata updated wmata.com/weekday silently after their weekly service alert email went out to note single-tracking Tuesday-Friday this week (though even the website is misleading, w/trains running less frequently than every 16min)

1:45pm Orange/Silver line silent service reduction update. Silver line trains are running about every 15-19 minutes. Orange line trains are running about every 21-23 minutes.

#wmata is performing single-tracking between Cheverly and New Carrollton until 5pm each day this week.

#wmata added two weekday "track maintenance" lines to its trackwork calendar (wmata.com/service/track-…), neither of which cover the current week's single-tracking.

After Orange Line single-tracking (Cheverly to New Carrollton) which apparently was uncoordinated within #wmata, someone at the agency has made the decision to run Silver Line trains back at their normal frequencies (12min), vs the ~20min headways they've run most of today.

After all-day unannounced vegetation clearing between Cheverly & New Carrollton, @Metrorailinfo has concluded single-tracking and is beginning to return Orange Line service to normal. #wmata