Daniel Tutor, 32, of Dupo died when the SUV he was riding in rear-ended a propane tanker truck in rainy weather on Illinois 3 in Sauget, police said.
Sauget Police Chief James Jones said the driver of the the SUV was treated at a hospital and released. The tanker truck driver was not injured in the crash that occurred at 11:55 p.m. Wednesday.
Jones said the driver of the tanker truck had stopped at a railroad crossing as required and had started to accelerate when an SUV hit the rear of the tanker. Tutor was sitting in the front seat and investigators believe he died upon impact, Jones said.
Jones said the crash remains investigation.
None of the propane leaked from the tanker, Jones said.
The vehicles were going north in the 3000 block of Mississippi Avenue, which also is known as Illinois 3.
Braun Colonial Funeral Home in Cahokia is handling arrangements for Tutor, whose family has asked for a private service.