BRITAIN’S roads could be entirely gridlocked in 20 years due to the electric car revolution, a report warns.
Experts claim more and more people will get behind the wheel because of the tax breaks on green-powered vehicles.
They are urging ministers to overhaul vehicle excise duty as the only way to avoid a crisis.
A document from the Tony Blair Institute for Global Change predicts the cost to the economy from traffic jams could balloon to £120billion a year by 2040.
The ex-PM’s lobby group says that, on current projections, the average driver will spend 50 per cent more time in queues within two decades.
And the public finances face a £30billion black hole due to loss of earnings from road duties — equivalent to a 6p rise in income tax.
Experts are warning the crisis may snowball as wealthier drivers increasingly switch to electric.
The cars are exempt from vehicle excise duty, meaning diesel and petrol motorists face having to pay the bill.
Experts say the best solution to avoid “unfairness” is to scrap it altogether and bring in road pricing, which charges all drivers by the mile.
The report states: “A new system of vehicle taxation is urgently needed. As more people purchase electric vehicles, changes to taxation will be harder to manage.
“Road pricing offers the opportunity to resolve these issues in a way that works for motorists and society.”
Energy firms should be classified with Olympic-style gold, silver and bronze rankings to show customers how green they actually are, suggests think tank the Social Market Foundation.