M4 closed J17–J18 westbound

Cleared Cleared at 22:57 on 26 Sept 2026, after 38 min.

Road closure on the M4 westbound at J17–J18 on Saturday 26 September 2026, from 22:18. Cleared at 22:57 after 38 min. Timeline of reports from National Highways.

1. ✕

   M4 westbound · J17–J18

   Road closed · cause not reported yet

   22:18–22:57 (cleared after 38 min)

   National Highways

See the M4 on the live map M4 traffic now

Timeline

1. 22:18 National Highways: road closed
2. 22:57 National Highways: road reopened
3. 22:57 All clear: no source reports it any more

What the sources said

• M4 westbound between J17 and J18

Other recent incidents on the M4

• M4 closed J16–J17 westbound · 23:28, still reported
• M4 closed J17–J18 westbound · 23:28, still reported
• M4 closed J20–J21 westbound · 22:43, still reported
• M4 closed J16–J17 westbound · 22:18, cleared after 38 min
• M4 closed J16–J17 westbound · 21:35, still reported
• M4 closed J19–J20 westbound · 21:35, still reported
• M4 closed J20–J21 westbound · 20:08, cleared after 2 h 17 min
• M4 crash J3–J2 westbound · 17:09, cleared after 42 min
• M4 crash J10–J8 eastbound · 12:42, cleared after 2 h 40 min
• M4 reported crash J17–J16 eastbound · 03:44, cleared after 1 h

About this page

This page shows what the data sources reported about this event and when, merged from every source that reported it at the same place. It doesn't say what caused it or whether anyone was hurt: no source reports that. Times are UK time. For live alerts, follow @motorways.me on Bluesky.