Update: Here's a post comparing problems between May 2008 and May 2010.
Thanks to FixWMATA for letting me cross-post.
WMATA provides a Daily Service Report (HERE) that tells a story of all of the problems their trains experienced each day. I went through July’s reports (July 1 – July 31) and tabulated the data. Here is what I found (the larger numbers):
120 WMATA trains experienced “brake problems” in July.
90 WMATA trains simply “did not operate” in July.
83 WMATA trains experienced a “door problem” in July.
63 WMATA trains experienced an “equipment problem” in July.
63 WMATA trains had their schedule or route adjusted (ie “expressed”) in July.
40 WMATA trains experienced an “operational problem” in July.
31 WMATA trains experienced a “signal problem” in July.
21 WMATA trains experienced a “sick customer” in July.
10 WMATA trains were delayed due to “police activity” (including suspicious bags) in July.