Traffic incidents
The following traffic incidents and congestion for M4 have been reported by Highways England, Traffic Scotland, Traffic Wales or Transport for London (TfL) in the last two hours:
There are no current incidents in this location.
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FULL SCREENUPDATED: 04:24
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M4 Roadworks
The following roadworks have been reported by various highways agencies and official transport sources.Click on a roadworks item to view more details on the traffic map.
ROAD WORKS
Location: The M4 eastbound between junctions J5 (Colnbrook)and J3 (Heathrow) .
Reason: Roadworks.
Status: Currently Active.
Period: from 22:41 on 4 Dec 2025 to 05:30 on 5 Dec 2025.
Lanes Closed: All lanes are closed.
Nearest town: 2.18m from Slough. CLEARED @ 03:37
Reason: Roadworks.
Status: Currently Active.
Period: from 22:41 on 4 Dec 2025 to 05:30 on 5 Dec 2025.
Lanes Closed: All lanes are closed.
Nearest town: 2.18m from Slough. CLEARED @ 03:37
M4
The M4 is a motorway in the United Kingdom that connects London and South West England. It runs from London to South Wales and it is a crucial part of the English transport network.
The M4 was first proposed in 1927 and construction began in 1958. It was completed in 1971, running from London to Reading, Berkshire and later extending to South Wales.
The M4 is one of the major roads in the UK and a significant part of the economy. The M4 has been upgraded in certain sections and currently consists of 146 miles (235 km) of motorway.
The M4 is one of the safest motorways in the UK. According to the Department of Transport (DfT), the M4 had a collision rate of just 0.41 per million vehicle kilometres between 2017-2018. This is lower than the UK major-road average of 0.71.
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Elsewhere on the web:
National Highways EnglandOfficial source of traffic updates.
Transport for London (TFL)Transport for London's (TfL) portal for transportation in London.
Traffic WalesThe Welsh government's traffic information service for Wales.
Traffic ScotlandLive traffic conditions and news for Scotland's road network.
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Location: eastbound between junctions J5 (Colnbrook)and J3 (Heathrow) .
Due to: Roadworks.
Period : from 22:41 on 4 December 2025 to 05:30 on 5 December 2025.
Lanes Closed : All lanes are closed.
Nearest town: 2.18m from Slough.
Due to: Roadworks.
Period : from 22:41 on 4 December 2025 to 05:30 on 5 December 2025.
Lanes Closed : All lanes are closed.
Nearest town: 2.18m from Slough.
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