LIVEIncidentM4 J22 westbound access — Lane closures22:25 (10:25pm)LIVEIncidentM4 eastbound within J4B — Lane closures22:25 (10:25pm)LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed22:20 (10:20pm)LIVERoadworksM4 eastbound between J15 and J14 — Lane closures22:20 (10:20pm)LIVERoadworksM4 eastbound between J15 and J14 — Lane closures22:20 (10:20pm)See all the latest news →LIVEIncidentM4 J22 westbound access — Lane closures22:25 (10:25pm)LIVEIncidentM4 eastbound within J4B — Lane closures22:25 (10:25pm)LIVERoadworksM4 eastbound between J17 and J16 — Hard shoulder closed22:20 (10:20pm)LIVERoadworksM4 eastbound between J15 and J14 — Lane closures22:20 (10:20pm)LIVERoadworksM4 eastbound between J15 and J14 — Lane closures22:20 (10:20pm)See all the latest news →
50M4 EASTBOUND BETWEEN J5 & J4B4 signalsset 22:19 (10:19pm)Overhead MessageM4 J21-J23 CLOSED20 signsset 21:45 (9:45pm)50M4 EASTBOUND AT J4B1 signalset 22:16 (10:16pm)Overhead MessageM4 BRIDGE CLOSED1 signset 20:45 (8:45pm)40M4 EASTBOUND AT J4B1 signalset 22:16 (10:16pm)Overhead MessageM4 CLOSED USE M481 signset 20:45 (8:45pm)Overhead MessageM4 BRIDGE CLOSED USE M481 signset 20:45 (8:45pm)Overhead MessageM4 BRIDGE CLOSED ALL SOUTH WALES TRAFFIC - USE M481 signset 20:45 (8:45pm)See all the overhead messages →See all the speed limit signs →50M4 EASTBOUND BETWEEN J5 & J4B4 signalsset 22:19 (10:19pm)Overhead MessageM4 J21-J23 CLOSED20 signsset 21:45 (9:45pm)50M4 EASTBOUND AT J4B1 signalset 22:16 (10:16pm)Overhead MessageM4 BRIDGE CLOSED1 signset 20:45 (8:45pm)40M4 EASTBOUND AT J4B1 signalset 22:16 (10:16pm)Overhead MessageM4 CLOSED USE M481 signset 20:45 (8:45pm)Overhead MessageM4 BRIDGE CLOSED USE M481 signset 20:45 (8:45pm)Overhead MessageM4 BRIDGE CLOSED ALL SOUTH WALES TRAFFIC - USE M481 signset 20:45 (8:45pm)See all the overhead messages →See all the speed limit signs →
Live M4 traffic data from National Highways · updated 22:27 (10:27pm) Wed 21 Oct 2026
M4
Map of M4 Junctions 1 to 5: London and Heathrow
The M4 begins at Chiswick in west London and runs on its elevated section past Brentford, then on to Hayes and Heathrow, where the airport spur leaves at junction 4 and the M25 crosses at junction 4B, before reaching Langley on the edge of Slough.
Airport passengers, taxi and private-hire drivers, and west London commuters all use this short but busy section. Heston services sits between junctions 2 and 3.
The road on the map is coloured by the live traffic flow speed, the same data as our live M4 traffic flow map. Choose westbound or eastbound above the map. Tap any junction number to open that junction’s own page.
Showing live speeds westbound. The map shows one direction at a time; tap the other button to switch. For both directions side by side, with every sign and incident, see the live M4 speed flow map.
Driving Junction 1 to Junction 5: Distances and Times
From junction 1 to junction 5 is about 11½ miles along the M4, about 10 minutes at the 70 mph speed limit in clear traffic. Here it is junction by junction; tap a junction to open its own page.
Distances are measured along the motorway between the centres of the junctions, from OpenStreetMap, and rounded to the nearest half mile. Times are at a steady 70 mph and do not allow for joining, leaving, roadworks or lower speed limits, so check the live map above and the live M4 speed flow map before you set off.
M4 Junctions 1 to 5 Now: Accidents, Incidents and Roadworks
Live traffic news at M4 Junctions 1 to 5
Incidents and roadworks between Junction 1 and Junction 5 that we are aware of.
M4M4 Motorway
laneClosures
Active nowUpdateEastbound
Time now: Wednesday, 21 October 2026, 22:27 (10:27pm)
22:25 (10:25pm)21 Oct 2026reported just now
Location
M4 eastbound within J4B
Direction
Eastbound
Lanes closed
Lane closures
Reason
Road or carriageway or lane management
Schedule
22:17 (10:17pm) Wed 21 Oct 2026 → 22:32 (10:32pm) Wed 21 Oct 2026
⏳Expected to clear in ~5mHA planned end: 22:32 (10:32pm) Wed 21 Oct 2026
M25M25 Motorway
M4 Eastbound Jct 4B to M25 Clockwise Jct 15 Link road closure
PlannedUpdateClockwise Road closed
Time now: Wednesday, 21 October 2026, 22:27 (10:27pm)
22:20 (10:20pm)21 Oct 2026reported 6 min ago
Location
link road from M4 J4B to M25 J15 clockwise
Direction
Clockwise
Lanes closed
Carriageway closed
Reason
Repair work
Schedule
22:00 (10pm) Wed 21 Oct 2026 → 05:30 (5:30am) Thu 22 Oct 2026
Forecast - not confirmed
🚧HA scheduled: 22:00 (10pm) Wed 21 Oct 2026 → 05:30 (5:30am) Thu 22 Oct 2026underway until 05:30 (5:30am) Thu 22 Oct 2026
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.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.
