A few months ago I was running along the southern end of the M1 on the near-permanent 50mph stretch pondering just how close we are to self-driving cars.

I was driving Autocar’s recently-departed Jaguar XJ long term loan car with the radar cruise control activated and was amazed at just how well the system was modulating between the need to keep me at 50mph and the need to keep me the correct distance from the car in front.

It struck me that if the XJ had side-ways facing parking radar - working with electrically-assisted steering - it could probably have relieved me of the onerous task of keeping the Jaguar between the white lines.

Indeed, I’ve already driven an experimental BMW X5 which used side-mounted radar (as opposed to ultrasonic) parking sensors which did just that. BMW called it ‘narrow passage assist’ and it’s been designed to stop vehicles clashing on narrow motorway lanes by overriding the driver and applying corrective tweaks to the steering.