The Trump administration has quietly set aside plans to require new cars to be able to wirelessly talk to each other, auto industry officials said, jeopardizing one of the most promising technologies for preventing traffic deaths.

A prestigious scientific organization on Oct. 11 called for more frequent and better inspections of freight railroad tracks to prevent potentially catastrophic oil and ethanol train crashes.

President Donald Trump’s road to getting legislation through Congress this year to restore the nation’s crumbling infrastructure appears increasingly precarious.