Who painted the rainbow?

Rainbow Tunnel, Waldo Grade, Marin“I was driving north on US-101 on the Waldo Grade in Marin County when I was struck by the sight of the tunnel which appeared like a rainbow except for the lack of color.

“Why not make it a rainbow?

“I was so certain that the bureaucrats at Sacramento would find 1000 reasons why I couldn’t paint the rainbows that I never made any effort to get their approval. – Alan S. Hart, CalTrans Engineer during 40 years on the job.