⚠ Closure
M4 Traffic

Sarn Park Services, M4

0Accidentsnone in National Highways’ incident data — but the overhead signs show M4 J21 - J23 CLOSED — see the signs5Roadworks activelive on the M4 right now — see details12Plannedscheduled on the M4 — see details

Live M4 traffic data from National Highways · updated 02:12 Thu 17 Sept 2026

M4

Sarn Park Services on the M4

Sarn Park is at Bridgend, roughly halfway between Cardiff and Swansea.

WhereM4, at Junction 36
Which sideOne site, reachable from both directions
OperatorWelcome Break

Food, fuel and facilities at Sarn Park

Food and drink includes Burger King, Subway, a Starbucks drive-thru, Krispy Kreme and WHSmith. There is also a fuel forecourt, a Days Inn hotel, and EV charging from GRIDSERVE, Applegreen and Tesla. Outlets and opening hours change from time to time, so check with Welcome Break if you are relying on something in particular.

Worth knowing

Bridgend Designer Outlet is just across the junction, so it is easy to combine a break with a bit of shopping.

In Wales the M4 is run for the Welsh Government by Traffic Wales, not National Highways. Our live news comes from National Highways, so it may not include incidents on this part of the motorway.

The nearest services either side

Heading west, the next services is Swansea West (at Junction 47). Heading east, the next is Cardiff West (at Junction 33). See all M4 services for the full list, from Heston to Pont Abraham.

Check the M4 before you stop

A quick look at the latest M4 traffic news tells you whether there is a closure or queue between you and Sarn Park. You can also check M4 roadworks, M4 accidents and every junction on our map of the M4 junctions.

M4traffic.co.uk is dedicated to the latest M4 traffic news, checked every five minutes, 24 hours a day. The M4 meets the M25 at Junction 4b near Heathrow and the M5 near Bristol — see M25 Traffic and M5 Traffic.