The M4 in Berkshire will become the longest section of motorway in Britain to have its hard shoulder removed.
The highly controversial plan was recently revealed by ITV News Meridian with motoring groups claiming the move will put safety at risk. The M3 and M25 will also have sections of the hard shoulder removed.
The Highways Agency will reveal the plans at a series of public events along the route next week.
There is queueing traffic with the carriageway partially blocked due to broken down car on the M4 Londonbound between J12 A4 ( Theale ) and J11 A33 / B3270 ( Reading ).
Queueing traffic due to accident, now on the hard shoulder on M4 Westbound in Berkshire between J11 A33 / B3270 (Reading) and J12 A4 (Theale). All traffic was briefly held whilst emergency services attended.
The M4 is still closed after a bus fire earlier this evening between junctions 1 and 3. Investigators are at the scene, and police can't say at this stage when the motorway will reopen.
A bus is on fire on the M4, closing the motorway in both directions between junctions 1 and 3. Those travelling on the opposite carriageway say they could feel the heat of the blaze. Firefighters have arrived at the scene.
One lane is closed on the M4 in both directions between J13 A34 (Chieveley / Newbury) and J14 A338 (Hungerford). Barrier repairs are being made after a lorry overturned at 8.30pm on Tuesday 28th May. The carriageway was closed until just after 5am.
The outside lane also remain closed on the opposite carriageway.
M4 London bound lane closed on entry slip road due to broken down vehicle at J6 A355 (Slough / Windsor).
Queueing traffic on M4 Eastbound between J17 A350 / A429 / B4122 (Chippenham) and J16 A3102 / B4005 (Swindon West). In the roadworks area.
Traffic returned to normal, accident cleared on M4 London bound between J14 A338 (Hungerford) and J13 A34 (Chieveley / Newbury).
There is slow traffic and one lane closed due to an accident involving a lorry and a car on the M4 London bound between J14 A338 (Hungerford) and J13 A34 (Chieveley / Newbury). Lane one (of three) is closed.