M4 closed J15–J16 westbound

Road closure on the M4 westbound at J15–J16 on Monday 28 September 2026, from 22:40. Cleared at 04:17 after 5 h 37 min. Timeline of reports from National Highways.

Status

Cleared 04:17 on 29 Sept 2026, after 5 h 37 min

Location

M4 westbound · J15–J16

Reported as

Road closed · cause not reported yet

Lanes

Road closed

Sources

National Highways

Timeline

1. Mon 22:40 National Highways: road closed
2. Tue 04:17 National Highways: road reopened
3. Tue 04:17 All clear: no source reports it any more

Source reports

• M4 westbound between J15 and J16

Other recent incidents on the M4

• M4 crash J18–J19yesterday 17:45 · cleared after 3 h 12 min
• M4 reported crash J19–J20 westboundyesterday 17:27 · cleared after 1 h 26 min
• M4 crash Both directionsyesterday 08:08 · cleared after 1 h 5 min
• M4 stopped traffic J3 westboundyesterday 06:48 · cleared after 3 h 3 min
• M4 crash J6 westboundWed 15:41 · cleared after 1 h 35 min
• M4 crash J10–J8 eastboundWed 07:50 · cleared after 2 h 6 min
• M4 stopped traffic J20–J21Wed 07:29 · cleared after 1 h 23 min
• M4 stopped traffic J4–J3 eastboundWed 06:44 · cleared after 3 h 3 min
• M4 crash J18Tue 19:23 · cleared after 46 min
• M4 crash J5–J4B eastboundTue 18:15 · cleared after 57 min

Live traffic and past incidents at M4 J15 and M4 J16.

The sources don't report causes or injuries, so neither does this page. Times are UK time. For alerts, follow @motorways.me on Bluesky.