A £15 billion cash boost is set to tackle more than 100 of the most notorious 'problem hotspots' on England's roads by the end of the decade.

David Cameron will tell business leaders that hundreds of extra lane miles will be created on motorways and trunk roads as part of a "roads revolution" that will speed up journey times.

Plans to build a tunnel under Stonehenge have reportedly been looked at by the Government to help ease congestion on the A303 and the route to the south west is among those that is set to benefit from the cash.

Work on stretches of the A1 round Newcastle, roads across the Pennines, the A47 in the east of England and the A27 on the south coast are also in line for funding.

Mr Cameron will tell the Confederation of British Industry's (CBI) annual conference in London the plans for the "biggest, boldest and most far-reaching" upgrade to roads in a generation will be announced in next month's autumn statement.

He is expected to say: "Our long-term economic plan is turning Britain round. And nowhere is this better demonstrated than in what we are doing on infrastructure.

"And I can tell you this today: in three weeks' time you will see an autumn statement where we choose the future again. At its heart is the biggest, boldest and most far-reaching road improvement programme in four decades: over 100 improvements to our major roads.

"Hundreds of extra lane miles on our motorways and trunk roads. The green light given to major projects that have been stalled for years. Action to improve some of the most important arteries in our country – like the A303 and the A1 – which for too long have held parts of our country back. And all underpinned by over £15bn worth of investment.

"This will be nothing less than a roads revolution – one which will lead to quicker journey times, more jobs, and businesses boosted right across the country."