It will become the second toll road in Britain - following the M6 in Staffordshire - and will run between junctions 23 and 29 of the M4 to relieve congestion on the outskirts of Newport.
The newspaper reports that the Chancellor will agree to guarantee loans for the building of the M4 relief road, but the devolved Welsh government will meet the cost - expected to be around £830 million.
More top news
A charity's campaign to improve protection for older people from scams has been given the backing of the Advertising Standards Authority.
A top health boss has told ITV News that change is needed to hospital services in north Wales, that could include A&E.
A fine and bright start to the week, with any lingering rain clearing away as we move throughout the afternoon.