In 1926, Route 66 began at Jackson Blvd and Michigan Avenue.

In 1933, the Route's start/end was relocated to Jackson Blvd and Lake Shore Drive.

In 1955, Jackson Blvd was changed to a one-way street west of Michigan Ave., and Adams street became the westbound route for Route 66. However, the route's starting point didn't change.

The Route 66 Begin sign is located on the south-side of Adams street, just west of Michigan Avenue. This sign is mounted very high, which is to deter theft of the sign. Stickers cover much of the sign post as travelers from around the world leave their mark as they begin their journey down the Mother Road.