Ford drivers will legally be able to take their hands off the wheel on the move after its BlueCruise technology has been approved in the UK.
Ministers have approved the "hands-off, eyes-on" technology for use on certain motorways.
It can control steering, acceleration and braking but a camera will monitor a driver's eyes so they stay alert.
The technology will only be available for 2023 models of Ford's electric Mustang Mach-E SUV at first.
It also means the model can keep a safe distance from other cars and even bring them to a complete stop in traffic jams.
Thatcham Research, an automotive research firm, said it was important to note that this is not a self-driving car but is "the next development in assisted driving technology".
"What makes it different, is that for the first time ever drivers will be permitted to take their hands off the wheel. However, their eyes must remain on the road ahead, " said Tom Leggett, vehicle technology specialist at Thatcham.
He added: "Crucially, the driver is not permitted to use their mobile, fall asleep or conduct any activity that takes attention away from the road."
Ford's car costs £50,830 and while the hands-off technology will be free for the first 90 days, drivers will then have to sign up for a monthly subscription.
Deliveries of the new model started last month. It has a maximum speed of 80mph and uses both cameras and sensors to detect lane markings and speed signs, as well as the position and speed of other cars on the road.
Transport Minister Jesse Norman said: "The latest advanced driver assistance systems make driving smoother and easier, but they can also help make roads safer by reducing scope for driver error."
Lisa Brankin, managing director of Ford in Britain and Ireland, also told the BBC's Today programme on Friday that the car will only take over when "the system feels it's safe" in certain "blue zones" that have been deemed as safe across 2,300 miles of pre-mapped motorways in England, Scotland and Wales.
"If your eyes are closed, the car will prompt you to put hands onto the steering wheel and take control… It will keep prompting the driver and if they don't respond, the car will steadily slow down to a stop," she said.
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