On April 15, the European Commission released a proposal to amend a 1996 European Union Directive on permitted dimensions of trucks in order to improve fuel economy. The proposal includes lengthening truck cabs to reduce air resistance and increasing maximum weight to install heavier yet more efficient batteries. The Commission said the proposal could reduce fuel costs by 5,000 euros per 100,000 kilometers, or $6,540 per 62,137 miles. If approved by the European Parliament and EU Council, the new vehicles could start being produced in 2018.