1940s: World War II. major troop and supply route to the Pacific Theater. 1946-- Bobby Troup's "Get Your Kicks on Route 66."
1950s: Often recognized as the Golden Era of Route 66. Postwar road to vacations and California.
1960s: Decline started. Too much traffic, accidents led to interstates replacing the old road. "Route 66" TV show.
1970s: Route 66 withers. Hundreds of businesses along the road die with the incredible rise of interstates which were replacing it.