So this is an old thread, but the subject is still pertinent.
It was raining a little bit and I was driving on the highway going to have dinner next to the beach/ocean at about 5 PM. We saw this beautiful full rainbow (sorry, no double rainbow) from across the highway. Made a speedy left turn and parked next to a Highways Department of Public Works and started shooting over the chainlink gate. Effect was less than ideal. So after couple of minute and joined by other people, we left the place and continue the drive to the restaurant. We saw a road with hardly any traffic and over the road the landscape was much better!
So, here's the photo, a pano of many shots of the rainbow!
Hope you like, especially Jack.
-r
PS., tried to post on the thread under "Rainbow" but it was so old, I think it was disabled.