Which evacuation method is considered the least safe?

The least safe evacuation method is typically considered to be the option of evacuating "train to roadbed." This method involves passengers exiting the train and moving onto the open tracks or the ground beside the tracks, which exposes them to several hazards. On the roadbed, passengers are vulnerable to moving trains on adjacent tracks, as well as potential contact with overhead infrastructure, or other environmental dangers.

In contrast, evacuating "train to train on adjacent track" provides a barrier between the two trains, which can help prevent injuries from passing trains. Evacuating to a train on the same track is generally also riskier, as it requires coordination with train traffic on that specific line and has the potential for more immediate risk from approaching trains.

While all evacuation methods require careful consideration and diligence, the train to roadbed method carries the highest level of danger due to direct exposure to train traffic and the inability to effectively manage that risk while evacuating.