Nova Iguaçu level crossing disaster
The Nova Iguaçu level crossing disaster occurred on June 7, 1951, at 4:25 a.m. when an electric train struck a gasoline truck on a level crossing near Nova Iguacu, twenty miles north of Rio de Janeiro, killing 54 people. The Estrada de Ferro Central do Brasil company's train was travelling from Belém, and its five steel cars were full of early morning commuters heading for Rio. The truck, which carried 4,500 gallons of gasoline, had stalled on the level crossing. When the train struck the tanker exploded; many of the passengers were burnt alive; some were still sitting in their seats, while others piled up by the doors. In all 54 people were killed and 44 more injured, resulting as the worst road accident that has occurred in Brazilian history. Sources
Railway Wrecks by Edgar A. Haine, page 146, publ 1993,

See also 
Train wreck

Railway accidents in 1951
Level crossing incidents in Brazil
Transport in Rio de Janeiro (state)
1951 in Brazil
1951 road incidents
June 1951 events in South America