What is one of the primary reasons for the growth of trucking after World War II? October 5, 2022 by 8i9x6 Trucks became larger and faster Shippers liked the door to door service which trucks could provide The Interstate Highway System was constructed which allowed trucks to give faster service over longer distances. The railroads gave up on truck type freight and stopped seeking it. See Answer The Interstate Highway System was constructed which allowed trucks to give faster service over longer distances.