The Government has approved an £860m scheme to remove the hard shoulder on the M4 and turn it into a running lane in Berkshire.
The decision was revealed by campaigners tonight following a letter sent to them by the Department for Transport.
It will be the biggest and most expensive road scheme the region has seen.
The entire section between Hayes, near Heathrow and junction 12 at Theale will be converted - the longest section of so-called Smart Motorway in the country.
The Government say it will reduce congestion. But campaigners have expressed anger.
The family of a lorry who died in a crash on the M4 near Reading have paid tribute to him.
Graham Elliott, who was 49 years old and from Dagenham, was killed when his truck overturned on the motorway.
It happened at around 4.50am on Wednesday 11th May 2016, between junctions 12-11 of the M4.
Drivers using the M4 near Reading are being warned of roadworks which will close the motorway for three nights from Wednesday.
A new bridge is being installed over the road as part of the construction of the new Shinfield Eastern Relief Road.
Diversions will be in place from 9pm until 6am.
One lane blocked and slow traffic due to broken down lorry on M4 London bound before J13 A34 (Chieveley / Newbury).
One lane closed and queueing traffic due to broken down lorry on M4 London bound between J14 A338 (Hungerford) and J13 A34 (Chieveley / Newbury).
M4 Westbound lane closed on exit slip road due to broken down car at J15 A346 Marlborough Road / A419 Marlborough Road (Swindon East).
Reports of one lane blocked and very slow traffic due to broken down vehicle on M4 Westbound at J10 A329(M) Wokingham / Bracknell.
Motorists in the Thames Valley are being warned about smartly-dressed conmen who tell them sob stories and trick them out of money.
Police say it's happened almost 30 times in just five days - on the M40 in Buckinghamshire; the M4 - including Chieveley along to Windsor, in Berkshire, and on the M25 into London. Mel Bloor sends the details..
One lane closed due to broken down lorry on M4 Westbound between J14 A338 (Hungerford) and J15 A346 Marlborough Road / A419 Marlborough Road (Swindon East).
Residents, road users, local business and the local community are being invited to have their say about plans for a major upgrade to the M4.
Under Highways Agency plans, around 32 miles of the M4 between London and Theale will be widened to four lanes in each direction by converting the hard shoulder to a running lane, and installing new technology along the road to help keep traffic flowing and drivers informed.
Today, a consultation begins and the Highways Agency is keen to hear people’s views on its plans.
The consultation will run until Sunday 21 December.
The first of 11 public information exhibitions will take place at the Madejski Stadium, Reading on Tuesday 18 November, at which members of the public will be able to look at detailed plans for the proposal and also speak to members of the Highways Agency project team.
People can take part in the consultation by completing our questionnaire which will be available alongside the consultation brochure and will also be available on the Highways Agency’s website.