Recommended Practice

Comparison of Rail Transit Vehicle Reliability Using On-Time Performance


This Recommended Practice describes the basic common procedures that rail transit systems can use to make meaningful comparisons of vehicle reliability.

Document History
Document Number Version Publication Date Publication Related Information
APTA RT-VIM-RP-024-12 03/01/2012 Published Current


 5-minute reliability, on-time performance, rail transit, vehicle reliability


This standard establishes a common measure, vehicle 5-minute on-time performance reliability, that allows rail transit systems to compare their vehicle reliability with the vehicle reliability of their peers, or to monitor changes in their vehicle reliability over time. These comparisons can be made weekly, monthly, quarterly or annually.

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