M4 closed between Junction 10 and Junction 11 near Reading, 18 to 21 September 2026

M4 on Wednesdays

M4

M4 Traffic on Wednesdays

By midweek the M4 shows its usual working pattern: busy hours around Heathrow, Reading and Swindon morning and evening, with lorries using the road between Bristol and London through the day.

Here you can see whether the latest Wednesday kept to that pattern, hour by hour in both directions.

The M4 on Other Days

For the road right now, see the live M4 speed flow map and the latest M4 traffic news, or look up any junction on the M4 junctions page.

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.