Key Performance Indicators

Rail Mean Distance Between Failures

Definition: An industry reliability standard that measures the mean distance (rail car miles) between mechanical failures reportable to National Transit Database, i.e., those precluding a revenue vehicle from completing its trip or starting its next scheduled trip.

Performance (May 2018):

In May, did not meet the Target; the actual being 20,402 rail car miles. Door system continues to be the least reliable.


  1. Continue targeting poorly performing systems for improvement
  2. Reduce repeat failures
  3. Improve incident management in service to reduce offloads
  4. Continue the new car procurement program to replace the aging fleet
  5. Continue the overhaul program to maintain the legacy fleet until replaced