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A404 southbound Jct 9b to M4 carriageway closure

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A404 southbound Jct 9b to M4 carriageway closure

A404 southbound Jct 9b to M4 carriageway closure

Cleared

Start time: Fri, Feb 6, 2026 9:00 PM
Expected end: Sat, Feb 7, 2026 6:00 AM
Duration: 9 hours
Road: A404(M) – A404(M) Southbound Between J9B And J9A
Category: Construction Work
Direction: Southbound
Carriageway: Dual Carriageway
Reason: Construction Work

Live incident

Active roadworks

Planned

Cleared

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First published: Fri, Feb 6, 2026 8:50 PM
Last updated: Sat, Feb 7, 2026 1:10 AM
Cleared: Sat, Feb 7, 2026 6:00 AM

Latest update: A404 southbound Jct 9b to M4 carriageway closure

Coordinates: 51.513678, -0.753457
Latitude span: 51.504734 – 51.522454
Longitude span: -0.768105 – -0.730194
Bounding box centre: 51.513594, -0.749150
Location descriptions: A404(M) southbound between J9B and J9A

A404(M) J9B southbound access

A404 southbound between A4130 and A404(M)/A4

A404(M) southbound within J9B

A404(M) J9A southbound access

A404(M) southbound between J9A and J9

Feed validity status: Active
Overall feed start: Fri, Feb 6, 2026 9:00 PM
Overall feed end: Sat, Feb 7, 2026 6:00 AM
Feed window length: 9 hours
Probability code (raw): certain
Compliance option (raw): mandatory
Source identification (raw): roadworks

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

Segment 1

40 coordinate pairs

Description: A404(M) southbound between J9B and J9A
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start2 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {9A36C08E-929F-4C16-83C3-50ECB9AD45A0}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 1,921 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.515638 -0.76197
51.515092 -0.761322
51.514928 -0.761111
51.514526 -0.760559
51.514398 -0.760347
51.514114 -0.75985
51.513812 -0.759296
51.513729 -0.759126
51.513553 -0.758741
51.513526 -0.758684
51.513241 -0.758
51.51312 -0.757701
51.512944 -0.757187
51.512804 -0.75673
51.512618 -0.756072
51.512467 -0.755442
51.512344 -0.754883
51.512316 -0.754726
51.512155 -0.753981
51.512038 -0.753451
51.511815 -0.752434
51.511564 -0.751302
51.510993 -0.748724
51.510946 -0.748509
51.510776 -0.747721
51.510625 -0.747063
51.510407 -0.746074
51.510029 -0.744341
51.509907 -0.743811
51.509642 -0.742579
51.509472 -0.741849
51.509313 -0.741234
51.509125 -0.740562
51.509088 -0.740404
51.509022 -0.740176
51.508957 -0.739933
51.508743 -0.739261
51.508585 -0.73879
51.508418 -0.738305
51.508126 -0.737509

Segment 2

6 coordinate pairs

Description: A404(M) J9B southbound access
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {BB3C1835-55AC-491B-B290-AA4AE5D6CF0F}
Linear Element Type: B Carriageway Entry Slip
From Distance: 10 m
To Distance: 278 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.518612 -0.763753
51.51858 -0.763764
51.518372 -0.763726
51.517332 -0.763135
51.517269 -0.763108
51.51632 -0.762616

Segment 3

8 coordinate pairs

Description: A404 southbound between A4130 and A404(M)/A4
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start2 End1
Linear Element Road: A404
Linear Element Model: The Network Model
Linear Element Id: {695B9677-7FB6-490C-BB5D-9F6CE2AAF42D}
Linear Element Type: B Carriageway
From Distance: 615 m
To Distance: 799 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.522454 -0.768105
51.522419 -0.768042
51.522328 -0.767886
51.522126 -0.76756
51.521916 -0.767248
51.521615 -0.766824
51.521433 -0.766569
51.521232 -0.76633

Segment 4

4 coordinate pairs

Description: A404(M) southbound between J9B and J9A
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End2
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {C1771B23-5BCE-4ACD-8D16-51BD5A85395A}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 88 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.51632 -0.762616
51.515984 -0.762321
51.515666 -0.761998
51.515638 -0.76197

Segment 5

9 coordinate pairs

Description: A404(M) southbound within J9B
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {DECFCE15-856A-4B91-A55C-406F1CE316B3}
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

51.521232 -0.76633
51.52105 -0.766119
51.520932 -0.765992
51.520642 -0.76574
51.520324 -0.765461
51.520133 -0.765293
51.519653 -0.764946
51.519077 -0.764552
51.519064 -0.764544

Segment 6

13 coordinate pairs

Description: A404(M) J9A southbound access
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {DE934E51-9F7F-4AD0-BC01-6F49D5847D52}
Linear Element Type: B Carriageway Entry Slip
From Distance: 2 m
To Distance: 196 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.507016 -0.733422
51.506961 -0.73344
51.506865 -0.733472
51.506802 -0.733494
51.506694 -0.73354
51.506649 -0.733541
51.506532 -0.733516
51.50646 -0.733489
51.506415 -0.733461
51.506387 -0.733433
51.506324 -0.733381
51.506247 -0.733271
51.505667 -0.732125

Segment 7

2 coordinate pairs

Description: A404(M) southbound within J9B
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {D4596AD0-E655-41E5-A3F3-D246E662C9BE}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 72 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.519064 -0.764544
51.518467 -0.764142

Segment 8

3 coordinate pairs

Description: A404(M) southbound between J9A and J9
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {259A2ACE-3FD6-41C1-9AAC-1860358109D6}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 169 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.505667 -0.732125
51.505009 -0.730734
51.504734 -0.730194

Segment 9

5 coordinate pairs

Description: A404(M) southbound within J9B
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {AAE6CFBC-861C-4D3F-8240-9818D0B56166}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 261 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.518467 -0.764142
51.518457 -0.764135
51.517335 -0.763394
51.517208 -0.763311
51.51632 -0.762616

Segment 10

4 coordinate pairs

Description: A404(M) southbound between J9B and J9A
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start1 End2
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {C1771B23-5BCE-4ACD-8D16-51BD5A85395A}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 88 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.51632 -0.762616
51.515984 -0.762321
51.515666 -0.761998
51.515638 -0.76197

Segment 11

2 coordinate pairs

Description: A404(M) southbound between J9B and J9A
Carriageway: Dual Carriageway
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: South Bound
Direction Relative: Aligned
Height Grade: Start2 End1
Linear Element Road: A404(M)
Linear Element Model: The Network Model
Linear Element Id: {9A36C08E-929F-4C16-83C3-50ECB9AD45A0}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 21 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.515638 -0.76197
51.51548 -0.761782

Geometry type: MultiLineString
Geometry points: 96
First coordinate pair: -0.761970, 51.515638
Road section segments: 1
Road section points: 96

View geometry JSON

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}

View road section coordinates

Cause type: Construction Work
Detailed cause: Construction Work
Compliance: Mandatory
Probability: Certain
Validity status: Active
Road management: Carriageway Closures