The UK's first toll motorway is being used by fee-paying motorists after it was officially opened on Tuesday.
Car drivers must pay £2 to use the new road
The barriers at the M6 Toll booths were raised for the first time at 1010 GMT after a ribbon-cutting ceremony at which Transport Secretary Alistair Darling was the guest of honour.
Motorists now have the chance to avoid congestion in the West Midlands by paying £2 to drive along the 27-mile route, formerly known as the Birmingham Northern Relief Road.
The project will support the arguments of those who favour tolls to tackle congestion nationwide if it proves to be a success.
After the opening ceremony, Mr Darling told BBC News 24 that the M6 Toll gives motorists more options.
"What this road is doing is firstly providing much needed additional capacity in the West Midlands, but it also gives drivers a choice.
"They don't have to use the toll road, but it's there if they want it.
The road has cost nearly £900m
"At £2 a car, I think many drivers may decide that, for the journey time, it would be something worth doing - I certainly would.
"Anyone who's used the M6 at peak times will know it can get very, very congested.
"But I think it is useful that people can choose whether or not to pay it."
The junctions with minor roads will opened on Tuesday morning and will be followed on Friday by the southern link to the M6 motorway.
By Saturday, the new motorway should be fully open.
The road's operator Midland Expressway Ltd (MEL) revealed last month that the £900 million highway project would be subject to a phased opening over a five-day period.
Managing director Tom Fanning told a news conference at the firm's
headquarters in Weeford, Staffordshire, last month that opening the road was a very complex process and that motorists' safety must be paramount.
Just hours before the road was due to open on Tuesday, Mr Fanning told BBC News it would be an "early Christmas present for motorists".
"It is exceptional value for money - £2 is the price of a cup of coffee," he said.
Mr Fanning told BBC News 180,000 vehicles were currently using the existing M6, although it had been designed to cope with only 72,000.
"We are a specific solution to a specific problem - the best advertisement for us is the M6 at the moment," he added.
Alistair Darling said he would pay to use the road
Use of the road - which is billed as offering a free-flowing alternative to the existing M6 - will initially be restricted to local motorists joining the route from Lichfield, Tamworth, Sutton Coldfield, Brownhills and Cannock.
MEL has been granted a 53-year concession to operate and maintain the M6 Toll, which will link junctions four and 11 of the M6.
MEL announced plans in May to levy a standard charge of £2 for cars, £5 for vans and £10 for lorries.
The operator claims the M6 Toll will save motorists approximately 45 minutes on an average journey time by avoiding the heavily-congested section of the M6 north of Birmingham.
About 140 staff have been employed on the toll route and a fleet of gritters and maintenance vehicles are standing by to help keep it running.