A train died on the Red Line; riders like the dog in This Is Fine

Too bad they don't list it for peak/offpeak times.

Subway reliability is the percent of customers who wait no longer than the scheduled time between trains.

First of all, I can't imagine how they'd even measure such a statistic. To do so, would seem to require a continuous counting of the number of people waiting at each platform. The Ⓣ has an extensive system of security cameras, but I'd be surprised if they're capable of doing that.

Their "reliability" number takes nothing else into consideration, including whether or not a train arrives at its destination in a timely manner. As every Ⓣ rider knows, merely boarding a vehicle is no assurance of a reliable commute.