Key Performance Indicators

Rail Mean Distance Between Failures

Definition: Measures the mean distance (rail car miles) between mechanical failures reportable to National Transit Database, i.e., those precluding a rail car from completing its trip or starting its next scheduled trip.

Performance (May 2019):

In May, did not meet the Target; the actual being 20,837 rail car miles. ATC, doors and friction brakes continue to be the most frequently malfunctioning systems.


  1. Target poorly performing systems for improvement
  2. Reduce repeat failures
  3. Improve incident management in service to reduce offloads
  4. Overhaul aging fleet