Rules requiring automakers to include rear-view cameras on new cars will be delayed until the end of this year.
The National Highway Traffic Safety Administration proposed them to prevent drivers from backing over children.
The new rules should have been decided by the end of this month, but late Tuesday evening, the transportation secretary told lawmakers they need more time before issuing regulations.
The requirements are supposed to start taking effect in 2014.
The rear-view cameras would add about$200 to the cost of each new vehicle.