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MTA Subway Mean Distance Between Failures: Beginning 2015

Published by data.ny.gov | State of New York | Metadata Last Checked: February 21, 2026 | Last Modified: 2026-02-20
Mean Distance Between Failures reports how frequently train mechanical problems cause delays by month and subway car class. It is the main indicator for subway car reliability used at NYCT and is used to compare performance over time and across different subway car types. Only a small proportion of subway delays are due to malfunctioning trains.

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