The Detroit–Windsor Truck Ferry is a ferry service that has transported cars and trucks across the Detroit River for over 100 years. It currently accepts only trucks. The ferry is the primary crossing for hazardous materials (HAZMAT) trucks between Windsor and La Salle in Ontario, and Detroit and the Downriver communities in Michigan, although other transport trucks may use it as a time-saving alternative to the bridges. Hazardous materials have been banned from the Ambassador Bridge and Detroit–Windsor Tunnel. The nearest alternative crossing that allows hazardous or radioactive materials is the Bluewater Bridge, which connects Port Huron, Michigan, and Sarnia, Ontario.