What Impact do Fuel Prices have on Traffic?

There should be sufficient data available to the State departments of transportation to describe the impact of variations in fuel prices on traffic. I wonder what the correlation is, and how elastic the demand curve is. I suspect it’s not elastic, and that funds are being diverted from other pursuits in order to provide for fuel.

A couple of years ago I looked for what New York’s fuel taxes were. The Automobile Club of New York asserts that 70 cents per gallon are tax, and has a petition for the State to suspend or cap the sales tax on gasoline. When you look at this map of retail prices bear in mind that a substantial percentage of the price is tax.

The last time I was in West Virginia, I noticed that the price on the pump noted the base price per gallon and the amount of tax. I think this practice should be common in all localities.