M4 Traffic.co.uk
M4 Traffic is dedicated to M4 traffic news, M4 traffic reports and information about M4 delays and roadworks.
M4 Traffic is part of the UK Traffic News network.
UK Traffic News is our central independent traffic news website which features the latest traffic news from around the UK.
M4 Traffic is one of our regional or motorway specific websites.
If you are interested particularly in M4 traffic or looking for a website that specialises in M4 traffic or a website dedicated to M4 traffic then that is exactly what M4 Traffic.co.uk is all about.
Information about the M4 Motorway
M4 Traffic also features news, updates and other information about the M4 motorway.
Search all the latest M4 traffic news →
Latest accident or incident on the M4
The most recent accident or incident on the M4 that we are aware of.
M4 eastbound lane 1 closure (173/2B to 172/5B)
21:5925 Sept 2026reported 28 min ago
- Location
- M4 eastbound between J19 and J18
- Direction
- Eastbound
- Lanes closed
- Lane closures
- Reason
- Repair work
- Schedule
- 20:40 Fri 25 Sept 2026 → 06:00 Sat 26 Sept 2026
Latest active roadworks on the M4
Roadworks live on the M4 right now.
M4 eastbound lane 3/2 closure
21:5925 Sept 2026reported 28 min ago
- Location
- M4 eastbound between J16 and J15
- Direction
- Eastbound
- Lanes closed
- Lane closures
- Reason
- Tree and vegetation cutting work
- Schedule
- 19:56 Fri 25 Sept 2026 → 06:00 Sat 26 Sept 2026
+ 2 more active roadworks - search all M4 traffic news →
Latest planned roadworks on the M4
The next planned roadworks scheduled on the M4.
M4 westbound Membury Services closure
21:5925 Sept 2026reported 28 min ago
- Location
- M4 westbound between J14 and J15
- Direction
- Westbound
- Lanes closed
- Carriageway closed
- Reason
- Maintenance work
- Schedule
- 21:00 Fri 25 Sept 2026 → 06:00 Sat 26 Sept 2026
Forecast - not confirmed
+ 2 more planned roadworks - search all M4 traffic news →
Road closed — on the overhead signs now
National Highways’ overhead signs are showing a road closure, as at 22:27 Fri 25 Sept 2026.
M48 CLOSED USE M4
Time now: Friday, 25 September 2026, 22:2720:1225 Sept 2026set 2 hrs ago⚠ 2 hrs old✓ Checked by us 22:27
M48 CLOSED
USE M4Overhead Message
WhereM49 northbound · on 1 signAlso onAlso showing on M49 signsSinceSet 20:12 Fri 25 Sept 2026We check these overhead signs at least every five minutes, but we can't guarantee a sign is still current if an incident or issue has been cleared and the sign has not been updated yet. Signs and news can each carry something the other does not - check both before you travel.
Search all the latest M4 traffic news →
Updated 22:27 Fri 25 Sept 2026
Powered by National Highways’ Transport Data Feeds.
About the M4 motorway
The M4 is one of the UK’s busiest and most important motorways, running around 189 miles from London west through Reading, Swindon and Bristol, across the Severn into South Wales to Newport, Cardiff, Swansea and Pont Abraham. It connects with the M25 (J4b), M32 (J19), M5 (J20) and the M48 Severn route (J21/J23). With heavy commuter and freight traffic, roadworks and incidents are common — so it pays to check the latest M4 traffic news before you set off.
M4 Traffic gathers the newest M4 traffic reports and updates in one simple, mobile-friendly place, refreshed throughout the day, so you can plan your route and avoid the worst of the queues.
The M4 in numbers — two motorways in one
The M4 is not the same road along its length, and the Department for Transport’s own M4 traffic counts show it plainly. At the London end it is a commuter motorway. By Bristol it is a freight route.
156,491
M4 vehicles a day
on the busiest stretch of the M4 motorway, beside junction 4 at Heathrow. That is roughly 109 every minute, around the clock, every day of the year.
2×
the lorries by Bristol
M4 lorry traffic more than doubles between the London end and the M4/M5 interchange — 4.0% of vehicles at Heathrow, 8.7% at Almondsbury. The M4 is Britain’s road to South Wales.
1 in 5
is a van at Bristol
24,926 light goods vehicles a day on the M4 at the M4/M5 interchange. Add the lorries and more than a quarter of that M4 traffic is somebody working.
192
M4 vehicles a minute
through the 7am peak at junction 4. Unlike the M25, the M4 has a real rush hour — a 32% swing across the day. We cover that motorway too at M25Traffic.co.uk.
That is why M4 traffic news is worth checking before you set off rather than after. An M4 accident or crash at the London end holds up commuters; the same crash past Swindon holds up freight bound for Wales and the Severn crossings — and both take a long time to clear on a motorway this busy. The latest M4 traffic news and updates on this website are refreshed every few minutes, all day.
Hourly figures are from the Department for Transport’s own M4 count point beside junction 4, counted on 3 September 2025, published 20 May 2026. Daily figures are Average Annual Daily Flow for 2025.