The population growth of the early 1900s paled by comparison to the population boom Berkeley experienced after World War II when the village population tripled from 1,882 in 1950 to 5,792 in 1960. At the same time, Berkeley lost a number of houses when the construction of the Interstate 290 extension in the late 1950s cut a north-south swath through the western section of the village. With traffic diverted to the new expressway system, the Chicago, Aurora & Elgin terminated its passenger service in 1957, but its route is still marked through the village by the Prairie Path for bicycling.