About
MARTA

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 (December 2022):

Rail Mean Distance Between Failure in December was 19,489 miles, which did not meet the goal of 23,000 miles. Note: Higher Rail Mean Distance Between Failure is better.