M4 crash Both directions

Cleared Cleared at 00:53 on 5 Oct 2026, after 2 h 5 min.

Crash on the M4 at Both directions on Sunday 4 October 2026, from 22:48. Cleared at 00:53 after 2 h 5 min. Timeline of reports from Traffic Wales and TomTom.

M4 · Both directions

Collision

Road closed · Sun 22:48–Mon 00:53 (cleared after 2 h 5 min)

Traffic Wales · TomTom

See the M4 on the live map M4 traffic now

Timeline

Sun 22:43 Traffic Wales: road closed
Sun 23:23 TomTom: collision, “Closed, Incident”, road closed
Sun 23:31 TomTom no longer reports it
Sun 23:33 Traffic Wales: now says incident, road reopened, “Now open : Both directions : J45 Ynysforgan to J46 Llangyfelach”
Sun 23:43 Traffic Wales no longer reports it
Sun 23:43 All clear: no source reports it any more
Mon 00:38 Traffic Wales: incident (reported again)
Mon 00:53 Traffic Wales no longer reports it
Mon 00:53 All clear: no source reports it any more

What the sources said

M4 : Now open : Both directions : J45 Ynysforgan to J46 Llangyfelach
Closed, Incident

Other recent incidents on the M4

M4 crash J17–J18 · 10:09, cleared after 2 h 50 min
M4 crash J6–J5 eastbound · 07:10, cleared after 1 h 9 min
M4 crash J3 eastbound · yesterday 18:51, cleared after 1 h 2 min
M4 closed J19 westbound · yesterday 07:57, cleared after 4 h 56 min
M4 delays J3–J2 · yesterday 06:41, cleared after 1 h 36 min
M4 reported crash J15–J16 westbound · Sat 12:09, cleared after 1 h 5 min
M4 crash J3–J2 eastbound · Sat 09:28, cleared after 45 min
M4 crash J8–J7 eastbound · Fri 20:12, cleared after 1 h 50 min
M4 reported crash J15–J14 eastbound · Fri 19:27, cleared after 43 min
M4 stopped traffic J20–J19 · Fri 15:47, cleared after 1 h 10 min

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.