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–yesterday 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
yesterday 00:38 Traffic Wales: incident (reported again)
yesterday 00:53 Traffic Wales no longer reports it
yesterday 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 closed J19–J20 westbound · yesterday 20:25, still reported
M4 closed J19 westbound · yesterday 20:22, still reported
M4 closed J20–J21 westbound · yesterday 20:22, still reported
M4 closed J15–J16 westbound · yesterday 20:18, still reported
M4 closed J13–J14 westbound · yesterday 20:18, still reported
M4 closed J12–J13 westbound · yesterday 20:18, still reported
M4 closed J16–J17 westbound · yesterday 20:18, still reported
M4 reported crash J5–J6 westbound · yesterday 18:35, cleared after 50 min
M4 crash J18 eastbound · yesterday 15:23, cleared after 3 h 33 min
M4 crash J10–J8 eastbound · yesterday 06:31, cleared after 3 h 20 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.