M4 J17 traffic
No incidents reported at M4 J17 right now.
Updated 03:27 UK time · at J17 and the stretches either side
Right now
Nothing reported at M4 J17 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 J17–J162 of 4 lanes closedM4 eastbound single lane running - switching (142/6B to 135/2B)
- Eastbound J18–J17Closed
Closures tonight
- Eastbound J18–J17Closed
Planned closures: next 7 days
Tuesday 3 November
- Eastbound J18–J17Closed
Wednesday 4 November
- Eastbound J18–J17Closed
Thursday 5 November
- Eastbound J18–J17Closed
Friday 6 November
- Eastbound J18–J17Closed
The last 90 days
Incidents
78
Collisions
15
Road closed
15times
Typical time to clear
51 minmedian of 72
Busiest time
20:00–21:00
Recent incidents
- M4 reported crash J17–J16 eastbound
- M4 reported crash J17 westbound
- M4 reported crash J17–J16 eastbound
- M4 reported crash J17 westbound
- M4 reported crash J17–J16 eastbound
- M4 reported crash J17 westbound
- M4 closed J16–J17 westbound
- M4 closed J16–J17 westbound
- M4 closed J17–J18 westbound
- M4 reported crash J17–J16 eastbound
- M4 crash J16–J17
- M4 stopped traffic J16–J17 westbound
- M4 reported crash J17–J16 eastbound
- M4 crash J17–J18
- M4 closed J16–J17 westbound
Junctions either side
Common questions
Is the M4 closed at junction 17 right now?
For roadworks: closed eastbound J18–J17 until 06:00.
Is M4 J17 closed tonight?
National Highways has 1 closure planned here tonight: eastbound J18–J17 closed 20:55–06:00.
How many crashes have there been at M4 J17?
15 collisions reported at or either side of J17 in the last 90 days, the latest on 31 Oct 2026 at 17:47.
Includes incidents at J17 and on the stretches either side of it. Sources: National Highways, TomTom, TfL and Traffic Wales. Times are UK time.