A tunnel with rainbow arches that connects the Golden Gate Bridge to greater Marin County has officially become the Robin Williams tunnel.

The San Francisco Chronicle reports the new Robin Williams Tunnel signs were installed Monday night.

The tunnel was unofficially known as the Waldo Tunnel.

The California State Senate last year approved a resolution to change the tunnel's name to honor the late actor and comedian.

Williams grew up and lived in the Bay Area.

The two signs — one for each side of the tunnel — cost $3,000 that was paid for using private donations.

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