It was commissioned on November 11 1926. It crosses 8 states and 3 time zones.
In 1926 only 800 miles of Route 66 were paved. Only in 1937 did Route 66 get paved end-to-end.
Because of a change in alignment of Route 66 in 1937, there is an intersection where Route 66 crosses itself at Central Avenue and 4th Street in downtown Albuquerque, New Mexico. Here, you can stand on the corner of Route 66 and Route 66.