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M4 eastbound Jct 20 to Jct 19 lane closure 183/9-180/9

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M4 eastbound Jct 20 to Jct 19 lane closure 183/9-180/9

M4 eastbound Jct 20 to Jct 19 lane closure 183/9-180/9

Cleared

Start time: Mon, Sep 14, 2026 7:54 PM
Expected end: Tue, Sep 15, 2026 5:00 AM
Duration: 4 hours 6 minutes 1 second
Road: M4 – M4 Eastbound Between J22 And J21
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: Lane 2 closed
Reason: Maintenance Work

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First published: Mon, Sep 14, 2026 7:58 PM
Last updated: Mon, Sep 14, 2026 11:49 PM
Cleared: Tue, Sep 15, 2026 12:00 AM

Latest update: M4 eastbound Jct 20 to Jct 19 lane closure 183/9-180/9

Coordinates: 51.573756, -2.598087
Latitude span: 51.567741 – 51.576194
Longitude span: -2.628822 – -2.573545
Bounding box centre: 51.571968, -2.601184
Location descriptions: M4 eastbound between J22 and J21

M4 eastbound between J21 and J20

Feed validity status: Active
Overall feed start: Mon, Sep 14, 2026 7:54 PM
Overall feed end: Tue, Sep 15, 2026 5:00 AM
Feed window length: 9 hours 6 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

2 coordinate pairs

Description: M4 eastbound between J22 and J21
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 3 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: {A339DD45-31D2-4C2B-8809-37586E1E7D1D}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 9 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.571146 -2.580045
51.571092 -2.579944

Segment 2

6 coordinate pairs

Description: M4 eastbound between J21 and J20
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 4 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: {9A94B25C-A762-430E-A886-FAFDA3DAA081}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 399 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.571092 -2.579944
51.570905 -2.579581
51.570335 -2.578534
51.569938 -2.577768
51.569159 -2.576326
51.568769 -2.575547

Segment 3

4 coordinate pairs

Description: M4 eastbound between J22 and J21
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 3 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: {F3111949-42F8-4E9B-B3DD-BE7B454C78E1}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 63 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.574178 -2.587183
51.574097 -2.586909
51.574034 -2.586714
51.573921 -2.586368

Segment 4

6 coordinate pairs

Description: M4 eastbound between J22 and J21
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 3 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: {56A37AD8-25DA-4070-B59A-F3B6168A77A2}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 271 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.57513 -2.590789
51.57491 -2.58982
51.574751 -2.589183
51.574415 -2.587952
51.574336 -2.58772
51.574178 -2.587183

Segment 5

8 coordinate pairs

Description: M4 eastbound between J22 and J21
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 3 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: {D732C72D-3C57-4C7B-919C-175C11131D1F}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 445 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.573503 -2.585227
51.573476 -2.585156
51.57329 -2.584662
51.572979 -2.583864
51.572668 -2.583167
51.572268 -2.582296
51.571644 -2.581047
51.571146 -2.580045

Segment 6

22 coordinate pairs

Description: M4 eastbound between J22 and J21
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 3 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: {A7C355F5-28C8-4ED5-A98E-806E7C9C10B1}
Linear Element Type: B Carriageway
From Distance: 112 m
To Distance: 1,542 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.571337 -2.628822
51.571463 -2.628432
51.572085 -2.626507
51.572418 -2.625458
51.57256 -2.625013
51.572743 -2.624409
51.572963 -2.623647
51.573284 -2.622483
51.573449 -2.621865
51.573642 -2.621088
51.573716 -2.620801
51.573881 -2.620125
51.574194 -2.618772
51.574452 -2.617506
51.574619 -2.616657
51.574776 -2.615822
51.574989 -2.614598
51.575268 -2.612813
51.575446 -2.611487
51.57554 -2.610753
51.575681 -2.609557
51.575681 -2.609514

Segment 7

24 coordinate pairs

Description: M4 eastbound between J22 and J21
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 3 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: {EA4346F2-1E4C-47EA-8434-E1824CC2811C}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 1,314 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.575681 -2.609514
51.575795 -2.608404
51.575881 -2.607467
51.575962 -2.606458
51.575977 -2.606271
51.576065 -2.604901
51.576116 -2.603862
51.576125 -2.603675
51.576146 -2.603127
51.576167 -2.602579
51.57619 -2.601526
51.576194 -2.600746
51.576181 -2.599721
51.576151 -2.598682
51.576067 -2.597339
51.576 -2.596458
51.575897 -2.595461
51.575828 -2.594868
51.575716 -2.594015
51.575568 -2.593032
51.575393 -2.592034
51.575305 -2.591585
51.575182 -2.591021
51.57513 -2.590789

Segment 8

4 coordinate pairs

Description: M4 eastbound between J21 and J20
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 4 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start2 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {95389D73-FE00-466C-8212-0202FD4420EA}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 179 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.568769 -2.575547
51.568705 -2.575426
51.56793 -2.573901
51.567741 -2.573545

Segment 9

3 coordinate pairs

Description: M4 eastbound between J22 and J21
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 0 lanes restricted
Operational Lanes: 3 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: {37C8843B-DDD1-41E1-B8D2-61861A58E4DC}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 91 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.573921 -2.586368
51.573876 -2.586228
51.573503 -2.585227

Geometry type: MultiLineString
Geometry points: 79
First coordinate pair: -2.580045, 51.571146
Road section segments: 1
Road section points: 79

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

Feed provider: National Highways
Data source: Roadworks
Feed version: 1
Record created: Mon, Sep 14, 2026 7:58 PM
Record versioned: Mon, Sep 14, 2026 11:49 PM
Coordinate source: Geometry

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Started Start time TBC

Description: A466 : Both directions : M48 J2 Newhouse to A48 Interchange : Resurfacing work : Road closed : Diversions in place : 12/10/26-15/10/26 2000-0600 :, Start time: 12/10/2026 20:00 , End Date: 15/10/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 09/10/2026 11:57

View update