M4 J18 traffic
No incidents reported at M4 J18 right now.
Updated 05:15 UK time · at J18 and the stretches either side
Right now
Nothing reported at M4 J18 at the moment.
Roadworks now
- Eastbound J18–J172 of 4 lanes closedM4 eastbound Jct 18 to Jct 17 speed limit 50mph (166/0 to 161/4)
- Eastbound J18–J173 of 4 lanes closedM4 eastbound Jct 18 to Jct 17 lane 4,3 and 2 closure (171/8 to 170/6)
- Eastbound J18–J17Closed
Closures tonight
- Eastbound J18–J17Closed
Planned closures: next 7 days
Wednesday 4 November
- Eastbound J18–J17Closed
Thursday 5 November
- Eastbound J18–J17Closed
Friday 6 November
- Eastbound J18–J17Closed
The last 90 days
Incidents
41
Collisions
6
Road closed
4times
Typical time to clear
45 minmedian of 39
Busiest time
11:00–12:00
Recent incidents
- M4 closed J17–J18 westbound
- M4 crash J18 eastbound
- M4 crash J17–J18
- M4 crash J18 eastbound
- M4 crash J18 eastbound
- M4 closed J17–J18 westbound
- M4 closed J17–J18 westbound
- M4 reported crash J18–J17 eastbound
Junctions either side
Common questions
Is the M4 closed at junction 18 right now?
For roadworks: closed eastbound J18–J17 until 06:00.
Is M4 J18 closed tonight?
National Highways has 1 closure planned here tonight: eastbound J18–J17 closed 21:02–06:00.
How many crashes have there been at M4 J18?
6 collisions reported at or either side of J18 in the last 90 days, the latest on 19 Oct 2026 at 06:45.
Includes incidents at J18 and on the stretches either side of it. Sources: National Highways, TomTom, TfL and Traffic Wales. Times are UK time.