About
MARTA

Key Performance Indicators

Bus Mean Distance Between Failures

Definition: An industry standard that measures the mechanical reliability of the fleet. It measures the average bus miles between National Transit Database (NTD) reportable mechanical failures i.e., incidents precluding a revenue 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 2017):

In November, met the Target; the actual being 6,252 miles. The overall number of breakdowns decreased from 955 in October to 903 in November.  The number of engine system failures decreased by 11%, that of HVAC system failuers decreased by 36%, that of cooling system failures increased by 32% and that of brake system failures decreased by 18%.