About
MARTA

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 rail car from completing its trip, or starting its next scheduled trip.

Performance (August 2017):

In August, met the Target; the actual being 33,630 rail car miles - an increase over that in July and that in August 2016. Incidents affecting Door and Friction Brake systems continue to be the most frequent. 

Actions:

  1. Target Door and Friction Brake systems for improvement
  2. Reduce repeat failures
  3. Improve management of incidents in service to reduce offloads