Here's a list of classic trucking movies which are not yet on IMCDb.
"They Drive By Night" (1940)
http://www.imdb.com/title/tt0033149/
"Thieves' Highway" (1949)
http://www.imdb.com/title/tt0041958/
"White Line Fever" (1975)
http://www.imdb.com/title/tt0073896/
"Breaker, Breaker" (1977). Starring Chuck Norris.
http://www.imdb.com/title/tt0075783/
"High Ballin'" (1978)
http://www.imdb.com/title/tt0077679/
"The Last of the Cowboys" (1977). Starring Henry Fonda.
http://www.imdb.com/title/tt0074589/
"Revenge on the Highway" (1992)
http://www.imdb.com/title/tt0105252/
"Sorcerer" (1977), Based on the French film "Salaire de la peur, Le (1953)"
http://www.imdb.com/title/tt0076740/
"Moonfire" (1972).
http://www.imdb.com/title/tt0066095/
"The most technically accurate trucking movie ever made"