About
MARTA

Key Performance Indicators

Mobility Mean Distance Between Failures

Definition: An industry standard that measures the mechanical reliability of the fleet. It measures the average Mobility miles between National Transit Database (NTD) reportable mechanical failures i.e., incidents precluding a Mobility vehicle from completing its trip, or starting its next scheduled trip. Currently, all mechanical breakdowns are counted as failures, thus exceeding the number of failures reported to NTD. 

Performance (November 2016):

In November, did not meet the Target; the actual being 8,741 miles. The overall number of breakdowns decreased by 14% from 103 in October to 89 in November.