Reverse cameras have become mandatory on all new vehicles sold in the United States, Car and Driver reports. The standard fit ruling applies to all new cars sold in American market that are built from May 1, 2018.

The move is part of a standardisation process issued four years ago by the US Department of Transportation (DOT), with the National Highway Traffic Safety Administration (NHTSA) issuing a mandate in 2014 that reverse cameras were to be in all new vehicles sold from May 1 this year.

The effort to implement the device as a standard feature on new cars has taken a decade – according to Peter Kurdock, the deputy general counsel with the Advocates for Highway & Auto Safety group, work on the matter began during the George W. Bush adminstration. “It literally took us 10 years to get them into the cars,” Kurdock told the publication.

The group, along with other consumer-safety groups, is looking at making a number of other active safety features to be standard on new cars. These include items such as lane departure warning, blind spot warning and automated emergency braking (AEB) with forward collision alert.

Even without mandates, automakers have been responding – while 20 manufacturers have pledged to make AEB a standard equipment item by 2022, a number of companies have already begun featuring active safety tech in offerings within their line-ups, among them Toyota with its Safety Sense and Honda with its Sensing suite.