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I read, that the train had 26 sec to stop but would have needed 2 more. To stop from 56 mph in 28 sec the train needed a constant decaleration of 2.93 ft/sec² if my physics are still correct. Regarding delay and build-up of brake power the required maximum might be more. Are freight train brakes good enough in a service application to reach this? As comparison ICE 3 brakes allow 3.6 ft/sec² in service and 6.0 ft/sec² in emergency application. Following a quote from the NTSB report: While filming on the bridge, the film crew heard an announcement saying “Train!” over the two-way radio. Some crewmembers ran off the bridge, while others took shelter on the bridge walkway. As the train approached, one or more crewmembers lifted the prop from the tracks by up righting one end and standing the prop next to the tracks. The forward-facing camera on the train recorded the accident. As the train approached the highway-rail crossing, its horn and bell were activated. After the crossing became visible in the video, people were discernable on and next to the tracks. As the train entered the crossing, the bed prop fell onto the tracks. End of Quote Perhaps the engineer realized the danger from the bed much later than discussed here. Regards, Volker Edit: I think my above calculation is wrong. I'll redo it in a new post.
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