Key Performance Indicators

Rail Mean Distance Between Service Interruptions

Definition: An industry standard that measures the reliability of the service (i.e., lost and delayed trips).  MARTA strives to come as close as possible to operating every scheduled trip on every day by having enough operators, well-maintained vehicles and track, and good schedules. Even with those, however, there are still going to be some times when vehicles break down, or a track problem slows down service.

Performance (January 2017):

​In January, did not meet the Target; the actual being 453 train miles.