ADVANCE FOR USE SUNDAY, JUNE 1, 2014, AND THEREAFTER- FILE - This May 28, 2010, file photo shows traffic jammed in both directions on Interstate 405 on the Westside of Los Angeles. With people driving more fuel efficient cars and fewer miles some states are pondering the question of how to pay for roads funded largely with gas taxes, and many are watching Oregon's test of a tax on miles traveled. (AP Photo/Reed Saxon, File)
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