During the Siege of Leningrad Leonid Kantorovich, a Soviet mathematician and economist, was the professor of VITU of Navy and in charge of safety on the Road of Life where he calculated the optimal distance between cars on ice, depending on thickness of ice and temperature of the air.
Leonid Vitaliyevich Kantorovich (Russian:   , IPA: [lnit vtalvt kntrovt (listen)) (19 January 1912  7 April 1986) was a Soviet mathematician and economist, known for his theory and development of techniques for the optimal allocation of resources. During the Siege of Leningrad, Kantorovich was the professor of VITU of Navy and in charge of safety on the Road of Life. He calculated the optimal distance between cars on ice, depending on thickness of ice and temperature of the air. 
