Definition: An industry reliability standard that measures the mean distance (vehicle miles) between
mechanical failures reportable to National Transit Database, i.e.,
those precluding a vehicle from completing its trip or
starting its next scheduled trip.
Performance (April 2018):
In April, met the Target; the actual being 7,814 miles. The overall number of NTD reportable failures decreased from 348 in March to 332 in April.