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 (May 2017):

In May, met the Target; the actual being 34,482 rail car miles. Incidents with Door and Friction Brake systems continue to be the most frequent, though slightly improving compared to the previous month.


  1. Target poorly performing systems for improvement
  2. Reduce repeat failures
  3. Improve in-service management of incidents to reduce offloads