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WASHINGTON — Federal policymakers crafting comprehensive transportation legislation should consider enhancing investments in low-emissions technologies across the freight sector, an executive with Cummins Inc. told a congressional panel July 16.

Trailer makers intending to sell their products in California beginning Jan. 1 must certify beforehand that the equipment meets the state’s Phase 2 greenhouse gas rule and receive an executive order, according to the California Air Resources Board.

The almost relentless thrust that has doubled crude output from the Permian Basin in three years is showing some signs of waning.

The U.S. average retail price of diesel dropped by 0.4 cent to $3.051 a gallon, the Department of Energy reported July 15. Meanwhile, crude oil slid to less than $59 a barrel during trading of West Texas Intermediate.

Chevron Corp. is seeking approval to modify its plans for a liquefied natural gas export facility on Canada’s Pacific Coast to an all-electric design that it says will result in the lowest greenhouse-gas emissions per ton of LNG of any large project in the world.

Clean Energy Fuels Corp. opened its newest natural gas fueling station in Hunts Point — the first station in New York City to exclusively offer renewable natural gas for medium- and heavy-duty vehicle fleets.

The leading edge of Tropical Storm Barry’s wind and rain is reaching Louisiana, where communities including New Orleans are bracing for a downpour that threatens to inundate already-high waterways. Gulf of Mexico operators have shut-in 1.01 million barrels a day of oil production.

President Donald Trump has cited his move to allow year-round sales of high-ethanol gasoline as farmers pressure him to dial back decisions to exempt oil refineries from biofuel-blending mandates, signaling the president sees the two issues as related.

A leading trucking official said “there is definitely a shift going on” for the industry to address its critical shortage of technicians.