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Long Island Rail Road
Mean Distance Between Failures

Graph of Long Island Rail Road Mean Distance Between Failures Performance Indicators

Sep 2008: 132,893 miles Oct 2007 — Sep 2008: 123,319 miles
Sep 2009: 157,224 miles Oct 2008 — Sep 2009: 139,643 miles

Mean Distance Between Failures (MDBF) is the average number of miles a railcar travels in revenue service before breaking down and causing a delay. The higher the mileage for the MDBF, the more reliable the equipment and the service.