Rainbow Tunnel Now Officially Named for Robin Williams Private donations paid for new signs By Newser Editors and Wire Services Posted Mar 2, 2016 4:32 PM CST 24 comments Comments In this photo from Tuesday, March 1, 2016, a sign stands at the northbound entrance to the recently renamed Robin Williams Tunnel in Sausalito, Calif. (Alan Dep) (Newser) – A tunnel with rainbow arches that connects the Golden Gate Bridge to greater Marin County has officially become the Robin Williams tunnel, the AP reports. The San Francisco Chronicle reports that the new Robin Williams Tunnel signs were installed Monday night. The tunnel was unofficially known as the Waldo Tunnel. State lawmakers approved a resolution last year to change the tunnel's name to honor the late actor and comedian, who grew up and lived in the San Francisco Bay Area. The two signs—one for each side of the tunnel—cost $3,000. Private donations paid for the cost.