According to a new report, falling revenue from taxes on fuel and vehicle excise duty will make our economy around £13bn a year worse off by 2029.
Conducted by the Institute of Fiscal Studies, the report suggests a 50% rise in fuel duty to meet the shortfall.
Though the government seem keen to find alternative ways to pay for the roads, they've also said that they will levy no tolls or road user charges on existing roads.
Be that as it may, this study concludes that the best solution to the problem might lie in charging motorists by the mile, with higher prices imposed at congested peak times.
But you'd hate that, wouldn't you?
Yet surely you want a safe and reliable road network on which traffic flows freely like water?
Well, I hate to say it, but many seem to think that the fastest and most efficient means of achieving this state of motoring nirvana is through directly charging you for each mile you travel.
According to the Environmental Transport Agency (ETA), this would gather the funds necessary to build well-maintained motorways to access every town in Britain.
Though some roads will continue to be heavily used, the ETA anticipates the need for an additional congestion charge.
Says ETA director Andrew Davis: “The cost of bringing all the roads up to scratch will be high but affordable.
“The technology for collecting the road charge has been around for years and is cheap to introduce. Put simply, the car uses its own global positioning device to deducts an amount from an allocated mobile telephone.
“This system means neither the government nor other members of the household need know where the driver has travelled – so it is good for privacy too.”
Yes, it makes a lot of sense.
But it's bound to be a very, very unpopular idea.
I mean, what do you think?