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The Keystone oil pipeline system, a major conduit linking Canada to the U.S. Gulf Coast, was shut down after crude leaked into a creek in Kansas.

California could become the first state to fine big oil companies for making too much money, a reaction to the industry’s supersized profits following a summer of record-high gas prices in the nation’s most populous state.

A new study from the American Transportation Research Institute that assessed the infrastructure needs for converting the U.S. vehicle fleet to battery electric — with an emphasis on trucking — underscored that the challenges inherent in such a shift will reverberate far and wide.

The national average price of diesel tumbled 17.4 cents to settle at $4.967, according to Energy Information Administration data released Dec. 5.

Hawaii transportation officials advocate a road usage tax starting with .8 cent per mile for electric vehicles to address shortfalls in traditional gas tax revenue arising from more green vehicles on roads.

SACRAMENTO, Calif. — Furious about oil companies’ supersized profits after a summer of record-high gas prices, California Gov. Gavin Newsom on Dec. 5 will formally start his campaign to punish big producers by asking the Legislature to fine them and give the money back to drivers.

NASHVILLE, Tenn. — Tennessee Gov. Bill Lee is considering allowing express toll lanes on highways and tripling a fee for electric car owners as he targets his first big push after winning re-election — paying for tens of billions of dollars in roadway projects.

Two new hydrogen hubs have been formed with a Southwest collaborative among Arizona, Nevada and the Navajo Nation as well as a six-state Southeast group featuring lead utilities.

A short guide to help state agencies collaborate in creating electric vehicle infrastructure has been published by a group of key national transportation, electric utility and energy groups.