On March 10, 2022, at approximately 10:33 a.m. PDT, a Caltrain Commuter Railroad Company (PCMZ) southbound passenger train collided with three stationary on-track maintenance vehicles at Milepost (MP) 11.6 in San Bruno, California. The collision caused a fire, derailment of the locomotive's front truck, and significant damage to the equipment and infrastructure. Fourteen individuals were injured, including passengers, crew, and a contractor. The Federal Railroad Administration (FRA) investigation found that the accident was primarily caused by an inadequate job safety briefing and failure to notify the crew before lifting track protection. Fatigue of the roadway worker in charge (RWIC) was identified as a significant contributing factor.