Perhaps the most well-known caricature of a light railway is the film "The Titfield Thunderbolt", made in 1953 as many of the light railways and other small branch lines were being closed. Despite the great public affection for these railways, very few were financially successful. Colonel H.F. Stephens was pivotal in the light railway world, and tried many techniques to make light railways pay, introducing some of the earliest railcars and also experimenting with a rail lorry built out of an old Model T Ford. Nevertheless, most light railways never made much money, and by the 1930s they were being driven out of business by the motor car. Although World War II resulted in a brief increase in the importance of these railways, very few lasted beyond the early 1950s. Those that survive today are generally heritage railways.