Dozens turned out to mark the 100th anniversary of the mission bell markers that have lined the historic route that stretches from San Diego to the Bay Area.
Volunteers also unveiled a new centennial bell in downtown San Francisco.
At one time, some 450 markers lined the route that is now Highway 101, but by the late 90s, only 100 remained. Now, thanks to Caltrans and volunteer efforts, some 555 new bells have been installed.
