Key Performance Indicators

Rail Mean Distance Between Failures

Definition: An industry standard that measures the mechanical reliability of the fleet. It measures the average rail car 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.

Performance (December 2017):

In December, did not meet the Target; the actual being 22,234 rail car miles. Door and friction brake failures remain the most frequent, contributing approximately half to the overall number. Record cold temperatures and winter precipitation was a major factor in the dip in performance.