Overnight road closures

The M4 westbound carriageway is closed from 22:30 until 05:30 sun 18 oct — about 7 hours.
You will need another route — the main carriageway is shut.

Exactly where

M4 Westbound Jct 4B to Jct 5 carriageway closure

Why the road is closed

M4 Westbound Jct 4B to Jct 5 Carriageway and link road closures for routine maintenance works

Diversion route

Diversion via National Highways and Local Authorities Network

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The M4 northbound exit slip road is closed now, from 22:00 on Sunday until 06:00 on Saturday — about 1305 hours.
The road stays open. You cannot come off here — carry on to the next junction.

Also closed on

Tonight Tomorrow Wed 14 Oct Thu 15 Oct Fri 16 Oct Sat 17 Oct Sun 18 Oct

Exactly where

M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closed

Why the road is closed

M4 westbound Jct 20 exit slip road to M5 northbound Jct 15 - carriageway closure for structure maintenance.

Diversion route

Diversion via M5 southbound, exit Jct 16 to turn and return M5 northbound.

Part of a scheme running until 5 Dec 2026

💬 Share on WhatsApp 📋 Copy 📍 Open in Maps All M4 closures More in South East

🔔 Get told before this happens again Early Warning alerts you the moment the M4 closes or backs up — straight to your phone. Set up →