A national road-pricing system should be introduced to make motorists pay for reducing carbon dioxide emissions, according to the government’s climate change advisory body.
In addition, the board has said that the speed limit on all motorways should be more strictly enforced and may have to be reduced to 60mph to help to meet legally binding carbon reduction targets.
The Committee on Climate Change, which devised the CO2 reduction targets and advises the government on how to meet them, has reported that emissions aren't dropping fast enough.
Among its suggestions for meeting targets are the introduction of road pricing as an additional tax on motorists, alongside fuel tax.
The report says: "From an emissions perspective, road pricing should be introduced as a complement to fuel duty rather than a substitute. This conclusion is buttressed by the fact that fuel duty plays a crucial role in providing incentives for purchase of electric cars, increasing electric car cost savings relative to conventional cars.”