They might only have a top speed of 56 miles an hour, but Sheffield’s newest buses have something in common with Formula 1 race cars.
The £160,000 machines have an energy saving braking power system similar to those used by racing champions.
Operator First has unveiled 27 of the buses which will serve passengers riding the services 22 from Woodhouse to Nether Edge and 20/20A Hemsworth to Hillsborough.
They are also lighter than a conventional single decker bus, are 30 per cent more fuel efficient and have new leather seats and free wi-fi to put them in pole position.
Jon Eardley, business manager for First in Sheffield, said: “These new buses deliver the latest energy saving benefits as well as a great travelling experience for our customers.
“Through the great work by the Sheffield Bus Partnership I’m sure this latest boost for customers will make travelling by bus even more attractive.”
The buses are called Wright Streetlite MicroHybrids.
They have motor generators in the braking system which re-use energy to power other parts of the bus, such as engine cooling and air compressors - similar to systems used in Formula 1.
First also introduced 41 new single decker buses to Sheffield last year, and said it had spent more than £10m in the last six months on vehicles.
Its latest machines were unveiled during Catch the Bus Week, which runs until May 4 and aims to promote public transport use.
A display on Fargate in Sheffield city centre allowed customers to look inside the buses and try the wi-fi service out.
Coun Leigh Bramall, Sheffield Council’s cabinet member for business, said: “This latest investment by First is welcome news for the people of Sheffield and will add to the the improving quality of the bus experience.”