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Gasoline pump prices have risen above $4 a gallon in all states in the U.S. for the first time ever as the last holdouts — Kansas, Oklahoma and Georgia — saw prices rise overnight, according to auto club AAA.

LONG BEACH, Calif. — Hydrogen fuel cells are being adopted in transit fleets, and trucking is poised to be the second mover with the fuel — and ultimately see a price at production comparable to diesel, experts said at ACT Expo.

Rivian Automotive Inc. fell almost 7% May 16 on word the electric vehicle startup is in a dispute with a key seat supplier that could jeopardize its delivery van contract with patron Amazon .com Inc.

The national average price of diesel dipped after a two-week surge, dropping 1 cent to $5.613 a gallon, the Energy Information Administration reported May 16.

Xos Inc., a manufacturer and services provider of Classes 5-8 battery-electric vehicles, powertrains, charging infrastructure and fleet management software, announced a strategic partnership with Allison Transmission Inc. to jointly develop heavy-duty Classes 7-8 commercial electric vehicles.

Hexagon Composites, a designer and manufacturer of clean fuel solutions for commercial vehicles, announced it signed an agreement to acquire a 40% stake in Cryoshelter, an Austria-based company specializing in the development of cryogenic tank technology for liquid renewable natural gas and liquid hydrogen.

Blue Bird Corp. announced it is building on its nearly century-long expertise of school bus manufacturing to expand its zero-emission transportation solutions to the commercial vehicle market.

Penske Truck Leasing and Shell Recharge Solutions North America announced a joint initiative to support light-duty electric vehicle charging at Penske locations.

Saudi Arabia’s energy minister said a dearth of refining capacity meant that gasoline and other oil products would remain expensive even if the world’s biggest exporters pumped more crude.

Cruise, the self-driving startup controlled by General Motors Co., is working with the automaker’s BrightDrop electric van business on a plan to develop autonomous delivery vehicles, people familiar with the matter said.