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Thirteen Corn Belt senators, led by Minnesota Democrat Amy Klobuchar and Iowa Republican Chuck Grassley, have petitioned the U.S. Environmental Protection Agency to stop issuing waivers that exempt certain oil refineries from federal biofuel laws.

A bill that would allow companies to road-test self-driving vehicles in New Hampshire may be facing some speed bumps.

As the auto market becomes more saturated with electric vehicles and vehicles with automation capabilities, the Missouri Department of Transportation is grappling with the changes these types of vehicles present.

Come November, Minnesotans may decide whether the sales tax they pay for a variety of auto-related services — from oil changes to car rentals — should be dedicated solely to road and bridge improvements across the state.

With cars becoming more fuel-efficient, the revenue from gasoline taxes is declining, leaving New Hampshire with inadequate funds to maintain roads and bridges, according to state Rep. Norman Major (R-Plaistow), chairman of the House Ways and Means Committee.

Pennsylvania will ask Uber Technologies Inc. and any company developing self-driving cars with the same technology onboard to immediately stop testing.

Houston will join 21 other cities in a national partnership aimed at addressing persistent transportation challenges as technology and mobility choices have planners rethinking how streets, sidewalks and private spaces interact.

After years of calling to restore highway user revenue, transportation advocates may see the funding return by fiscal 2020.

Over and over in their decadeslong war on smog, Southern California regulators have failed to use a powerful tool against ports, warehouses and other freight and logistics hubs that are magnets for air pollution.

The fatal crash involving an Uber self-driving car in Arizona last month has not dissuaded the North Carolina Turnpike Authority from urging companies to test autonomous vehicles on the Triangle Expressway in western Wake County.