Overview
- Radius estimates drivers save £1.35–£1.65 in fuel for every hour driven at a steady 70 mph using cruise control.
- The model assumes typical economy of 40 mpg for petrol cars and 50 mpg for diesel on UK motorways.
- At that speed, usage is put at about 7.96 litres of petrol or 6.36 litres of diesel per hour, with cruise control trimming roughly 1.11 litres and 0.89 litres respectively.
- Applied across Britain’s busiest motorways, the firm projects potential savings of £270,000–£330,000 per day, or about £120 million a year.
- Cruise control is standard on most modern cars but remains underused, with experts advising it for flat, steady motorway stretches to reduce acceleration and braking.