After a high-speed collision near Toledo, Spain, killed at least 68 people, rail safety experts said the rough consensus that it is best to sit in the middle of a train has its limits.

© Oscar Del Pozo/Agence France-Presse — Getty Images

A train accident near Toledo, Spain, which killed at least 68 people, was one of the deadliest in the country’s history.

© Manu Fernandez/Associated Press

One train rear-ended another, sending two carriages down an embankment.