Makarand writes "A Dutch invention is promising to make vehicles atleast 50% more efficient and also bring down the soot and carbon dioxide emissions. This is made possible by replacing the conventional wheels by 'in-wheel' electric engines which are normal electric engines turned inside out. No transmission is necessary as the in-wheel engines are powered by battery-packs installed on the vehicle. A diesel-powered generator which replaces the original engine on the vehicle charges the battery-pack continuously. The Dutch company E-Traction has built a bus using this technology that will undergo testing for the next six months."