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California drivers soon may pay $4 a gallon at the pump after refinery upsets pushed up the wholesale market in San Francisco to the strongest level in almost seven years.

The Environmental Protection Agency notified California in a letter Sept. 24 that it has failed to file complete plans for fighting conventional air pollution and may lose highway funding as punishment.

The Minnesota Department of Transportation has released a report that provides recommendations for reducing greenhouse gas emissions across modes of surface transportation, including heavy trucks.

WASHINGTON — The oil refining industry is ready for an upcoming mandate on the type of fuel to be used by the maritime industry, but shippers are scrambling to get ready as the deadline draws near.

The U.S. average retail price of diesel soared 9.4 cents to $3.081 a gallon, the Department of Energy reported Sept. 23, bolstered by a crisis in Saudi Arabia after a drone attack on a major oil plant Sept. 14.

California is asking a federal court to prevent President Donald Trump from stripping the state of its power to set limits on auto emissions of greenhouse gases that are stricter than those of the national government.

Oil in London was on track for its biggest weekly increase since January as traders waited to see whether Saudi Arabia can fulfill promises to swiftly repair critical facilities attacked last weekend.

Amazon will buy 100,000 electric vans to assist with Prime deliveries, according to CEO Jeff Bezos, who made the announcement at the National Press Club in Washington on Sept. 19.

Congressional support for technologies that promote energy efficiency is key to reducing emissions across the transportation landscape, industry stakeholders told a House panel Sept. 18.

LONG BEACH, Calif. — A panel representing the shipping industry spoke about the looming International Maritime Organization mandate that will require cargo vessels to burn low-sulfur diesel, and shippers and carriers said the requirements could lead to price increases or the rerouting of freight.