M4 Road Closures — Official Records & Permits
Current and upcoming M4 motorway closures. Full permit references, promoting organisations, and highway authority details.
About the M4
This profile summarises the verified junction records linked to the M4. It identifies the mapped junction coverage used on this page and does not claim a route length, endpoint, ownership or current traffic status.
Road reference
M4 motorway
Matched to the motorway reference on the verified junction records.
Mapped junctions
50 records
Junction references currently represented in the verified dataset.
Coordinate status
50 of 50 verified
Verified coordinates are retained as junction map points, not a route centreline.
Mapped context
17 county labels
40 nearby locality labels across the mapped junction records.
Route context for M4 closures
The live list below reports current and planned records associated with M4. Junction locations and closure locations remain separate map references.
Browse all M4 junctionsShowing 4 of 14 M4 records
Updated every 15 minutesM4 — Live Statistics
Based on all 14 records for M4, including any hidden by the filters above.
By Severity
| Status | Map preview | Directions | Share | |
|---|---|---|---|---|
Bath | mediumMediumActiveActive NowStarted: 26 Aug 2026 23:00 Ends: 31 Aug 2026 23:00 | |||
J34 Miskin to J33 Capel Llanilltern | mediumMediumActiveActive NowStarted: 24 Aug 2026 20:00 Ends: 29 Aug 2026 06:00 | |||
A4054 Merthyr Rd, Total Closure Northbound from Birch Hill to Ta | mediumMediumActiveActive NowStarted: 17 Aug 2026 20:00 Ends: 7 Sept 2026 06:00 | |||
Colnbrook | mediumMediumActiveActive NowStarted: 10 Aug 2026 19:00 Ends: 2 Sept 2026 05:00 |
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M4 Junctions
View all 50 junctionsRoad Closures on the M4
Road Closures UK shows all 14 current and planned closures on the M4 motorway, sourced directly from National Highways' Transport Data Feeds and Street Manager. Each record includes the full permit reference number, the promoting organisation carrying out the works, the responsible highway authority, the work status, and whether a Temporary Traffic Regulation Order (TTRO) is required — information not available on Google Maps, Waze, or other traffic apps.
What the current M4 records show
Of the 14 records currently published for M4, 4 are under way now and 10 are scheduled to start later. Locations affected include Bath, Compton, Colnbrook and A4054 Merthyr Rd, Total Closure Northbound from Birch Hill to Ta. Recorded severity is medium (14). The latest scheduled end date on this page is 18 September.
Live closure details
Open a closure for its permit reference, exact timings and affected-road information.
- M4 : Northbound : A4054 Merthyr Rd, Total Closure Northbound from Birch Hill to Taffs Wells Roundabout : Diversions in place : 17/08/26-07/09/26 2000-0600
- M4 : Eastbound : J34 Miskin to J33 Capel Llanilltern : Roadworks : Road closed : Diversions in place : 24/08/26-29/08/26 2000-0600
- closure — Y JUNCTION AT DOWNS HOUSE NORTH OVER M4 TO JUNCTION TO BAILEY HILL FARM, BAYDON
- closure — A34 FROM J A4185 TO J M4 S, VALE OF WHITE HORSE
- closure — A34 FROM J A4185 TO J M4 S, VALE OF WHITE HORSE
- roadworks — A4 M4 JUNCTION 5 ROUNDABOUT, SLOUGH
- roadworks — JCT 17 M4 TO B4069 B4122, DRAYCOT CERNE
- roadworks — A4 M4 JUNCTION 5 ROUNDABOUT, SLOUGH
- roadworks — M4 FROM LEIGH DELAMERE SERVICES TO J18 W, NORTH WILTSHIRE
- roadworks — A429 JUNCTION 17 OF M4 NORTH TO JUNCTION WITH CHURCH LANE, LOWER STANTON ST QUINTIN
Frequently Asked Questions
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