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DETROIT — The U.S. government’s highway safety agency wants detailed information on how Tesla’s Autopilot system detects and responds to emergency vehicles parked on highways.

Louisiana communities battered by Ida faced a new danger as they began the massive task of clearing debris and repairing damage from the storm: the possibility of weeks without power in the stifling, late-summer heat.

Hours-of-service flexibility for truckers involved in critical relief efforts is one element of the federal government’s response to Tropical Depression Ida.

Although federal regulators are studying a possible change in the way motor carrier safety is measured, the Compliance Safety Accountability program is likely to remain in place, a trucking attorney told a group of industry executives.

Hurricane Ida forced Kansas City Southern to shut its main line in Louisiana and has halted exchanges between railroads in New Orleans, which may worsen delays in a U.S. shipping industry that already is stretched thin.

WASHINGTON — Hurricane Ida is sure to take a toll on the energy, chemical and shipping industries that have major hubs along the Gulf Coast. But the impact on the overall U.S. economy likely will be modest so long as damage estimates don’t rise sharply and refinery shutdowns are not prolonged, economists say.

The National Highway Traffic Safety Administration is accepting public comments on the agency’s intention to request approval for an information collection regarding event data recorders.

The port of New Orleans has halted container terminal and break-bulk operations as Hurricane Ida lashes the Louisiana coast with torrential rain and heavy winds.

ORLANDO, Fla. — A Tesla using its partially automated driving system slammed into a Florida Highway Patrol cruiser Aug. 28 on an interstate near downtown Orlando and narrowly missed its driver, who had pulled over to assist a disabled vehicle.