Gas Prices (in Photo Form) on the Road to California

On a holiday road trip to California, I took some snapshots of some of the gas stations along the way to see the differences in gas from here in Tucson, which was $3.28 at the Shell gas station on Valencia Road and 12th Avenue, to Whittier.

And here is a trip to Southern California in gas prices:

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In Picacho Peak, on Picacho Peak Road, this Shell gas station is $3.59 per gallon, however the Shell gas station across the street offered a different price.