M4 eastbound lane 1 and 2 closure (47/0 to 44/6) and lane closure on Jct 8/9 exit/entry slip

Cleared

Start time: Mon, Aug 10, 2026 7:38 PM
Expected end: Tue, Aug 11, 2026 5:00 AM
Duration: 3 hours 52 minutes 1 second
Road: M4 – M4 Eastbound Between J8 And J7
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: 2 of 2 lanes affected, 1 of 1 lanes affected
Reason: Maintenance Work

Live incident

Active roadworks

Planned

Cleared

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First published: Mon, Aug 10, 2026 8:08 PM
Last updated: Mon, Aug 10, 2026 10:57 PM
Cleared: Mon, Aug 10, 2026 11:30 PM

Latest update: M4 eastbound lane 1 and 2 closure (47/0 to 44/6) and lane closure on Jct 8/9 exit/entry slip

Coordinates: 51.498297, -0.720323
Latitude span: 51.489542 – 51.499734
Longitude span: -0.747205 – -0.711940
Bounding box centre: 51.494638, -0.729573
Location descriptions: M4 eastbound between J8 and J7

M4 eastbound between J10 and J8

M4 J8 eastbound access

M4 J8 eastbound exit

Feed validity status: Active
Overall feed start: Mon, Aug 10, 2026 7:38 PM
Overall feed end: Tue, Aug 11, 2026 5:00 AM
Feed window length: 9 hours 22 minutes
Probability code (raw): certain
Compliance option (raw): mandatory
Source identification (raw): roadworks

Management type value: other
Contra-flow flag (raw): false
Width restriction flag (raw): false
Height restriction flag (raw): false
Weight restriction flag (raw): false

Segment 1

6 coordinate pairs

Description: M4 eastbound between J8 and J7
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 2 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {0A24A8FB-80BB-4138-94E4-5F5A6B929867}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 54 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.499329 -0.712723
51.499326 -0.712672
51.499324 -0.712628
51.499322 -0.712584
51.499308 -0.712133
51.499306 -0.71194

Segment 2

5 coordinate pairs

Description: M4 eastbound between J8 and J7
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 2 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {24ABFEBB-4AB3-4668-830E-2F661F3C1F80}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 26 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.499341 -0.71311
51.499336 -0.713001
51.499338 -0.712908
51.499335 -0.712836
51.499329 -0.712723

Segment 3

5 coordinate pairs

Description: M4 eastbound between J10 and J8
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 2 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {083D6D01-FC84-49B1-87BC-C7037B790508}
Linear Element Type: B Carriageway
From Distance: 554 m
To Distance: 833 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.489542 -0.747205
51.490069 -0.745562
51.490376 -0.74468
51.490479 -0.744388
51.490748 -0.743672

Segment 4

11 coordinate pairs

Description: M4 J8 eastbound access
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {D8836978-BEA4-44BC-A754-31FDA1B0BC37}
Linear Element Type: B Carriageway Entry Slip
From Distance: 9 m
To Distance: 257 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.499734 -0.722888
51.499705 -0.722789
51.499654 -0.722645
51.499615 -0.722471
51.499604 -0.722302
51.499612 -0.721928
51.49964 -0.721312
51.499672 -0.72062
51.499689 -0.72005
51.499692 -0.719703
51.499694 -0.719357

Segment 5

11 coordinate pairs

Description: M4 J8 eastbound exit
Lanes Restricted: 1 lane restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {3FC76A8B-4B88-6629-A42A-5D71D3A9041C}
Linear Element Type: B Carriageway Entry Slip
From Distance: 0 m
To Distance: 439 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.499694 -0.719357
51.499723 -0.718425
51.499704 -0.71743
51.49969 -0.71702
51.499655 -0.716264
51.499612 -0.715555
51.499525 -0.714433
51.49944 -0.713439
51.499426 -0.713259
51.499358 -0.71314
51.499341 -0.71311

Geometry type: MultiLineString
Geometry points: 38
First coordinate pair: -0.712723, 51.499329
Road section segments: 1
Road section points: 38

View geometry JSON

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}

View road section coordinates

Cause type: Road Maintenance
Detailed cause: Maintenance Work
Compliance: Mandatory
Probability: Certain
Validity status: Active
Road management: Other