The portrayal of the trucking industry in United States popular culture spans the depictions of trucks and truck drivers, as images of the masculine side of trucking are a common theme. The portrayal of drivers ranges from the heroes of the 1950s, living a life of freedom on the open road, to the depiction of troubled serial killers of the 1990s. Songs and movies about truck drivers were first popular in the 1940s, and mythologized their wandering lifestyle in the 1960s. Truck drivers were glorified as modern day cowboys, outlaws, and rebels during the peak of trucker culture in the 1970s.