Onatra (Omnium NAtional de TRAnsports) was a road transport company, based in Marseille. It was one of the most important French companies for the transport of hazardous materials. The company was founded in 1950 by Jean Arcostanzo. In the 60s and 70s it was one of the most important French transport companies, moving from general transport to containers and then to tanks, and in particular to the transport of dangerous materials, taking advantage of a steadily increasing demand during the post-war period. boom, due in particular to the development of the French chemical industry. But the company is also experiencing social tensions.