MTA LIRR Mean Distance Between Failures: Beginning 2015

Mean Distance Between Failures represents the number of miles a rail car travels before a mechanical failure makes the train arrive at its final destination more than 5 minutes and 59 seconds later than scheduled. This measures the reliability of equipment in revenue service.平均故障距离代表铁路车辆在机械故障导致列车比预定时间晚5分59秒到达终点站之前所行驶的英里数。该指标衡量了收入服务中设备的可靠性。