A new report says congestion on the M25 is so bad the region's economy is at risk and urgent action must be taken.
The report by Highways England found the stretch of motorway between the A3 in Surrey and the M40 in Buckinghamshire had the worst traffic in Europe with more than 220 thousands vehicles using it every single day.
In a highly controversial move it says key roads in Berkshire, Buckinghamshire, Surrey and Hampshire should be improved to cope with the growing problem.
This report is from our Transport Correspondent Mike Pearse.
There have been two accidents on the A3. One lane is blocked and there is very slow traffic due on A3 Northbound between A31 Farnham Road (Hogs Back) and Egerton Road (Cathedral Turn).
There is congestion to the A283 / B3001 Elstead Road. Initially there was just one minor accident that had blocked a lane prior to the Cathedral Turn, but a little further behind it, two other couple of vehicles also collided.
One lane is blocked and there is queueing traffic because of an overturned car on the A3 Northbound at Guildford before Egerton Road (Cathedral Turn), congestion to B3000 ( Puttenham / Compton). Lane two (of two lanes) is blocked.
One lane blocked and slow traffic due to accident, two vehicles involved on A3 London Road Northbound between A3(M) J1 / A3 Clanfield and Chalton Lane ( Chalton turn off). Note change of direction. One of the cars has hit the central reservation.
Reports of A3 Northbound blocked due to fallen tree at B3006 (Ham Barn Roundabout)
Hampshire Police have confirmed the name of a man who was killed in a collision on the A3 near Liphook on New Year's Day.
James Robert Stephenson, 32, from Liphook was on a bicycle when the accident involving multiple vehicles occurred. It happened shortly after 7.30am. A police investigation is underway into the exact circumstances that led to the crash.
Mr Stephenson's family paid tribute to him:
The A3 Portsmouth Road is closed at B2149 Havant Road after an accident on a mini roundabout.
Heavy traffic due to contraflow and emergency repairs on A3 Hindhead Tunnel in both directions between A333 (Hazel Grove Interchange) and Thursley. One of the tunnels is closed, with single lane two-way traffic through the other tunnel, possibly for the rest of today.
There are reports that a set of step ladders is in the road on the A3 Southbound between A320 (Stoke Road interchange) and Egerton Road (Cathedral Turn).
One lane is closed and there is queueing traffic at Cobham after a police incident on A3 Northbound at A245 Portsmouth Road (Painshill). There is congestion on A3 Portsmouth Road to Old Lane. Lane one (of three) remains closed after all traffic was held in both directions earlier.