Crash View

A404 southbound lane 1 closure (50/8 to 48/1)

Cleared

A404 southbound lane 1 closure (50/8 to 48/1)

Start time
Tue, Sep 22, 2026 8:13 PM
Expected end
Wed, Sep 23, 2026 5:00 AM
Duration
3 hours 2 minutes 1 second
Road
A404 – A404 Southbound Between A4130 And A404(M)/A4
Category
Road Maintenance
Direction
Southbound
Carriageway
Dual Carriageway
Lanes affected
Lane 1 closed, 1 of 1 lanes affected, 1 of 2 lanes affected
Reason
Maintenance Work
Live incident
Active roadworks
Planned
Cleared
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First published
Tue, Sep 22, 2026 8:13 PM
Last updated
Tue, Sep 22, 2026 10:41 PM
Cleared
Tue, Sep 22, 2026 11:15 PM
  • Latest update: A404 southbound lane 1 closure (50/8 to 48/1)
Coordinates
51.522647, -0.771855
Latitude span
51.513712 – 51.530465
Longitude span
-0.785081 – -0.759088
Bounding box centre
51.522089, -0.772085
Location descriptions
  • A404 southbound between A4130 and A404(M)/A4
  • A404(M) southbound within J9B
  • A404(M) southbound between J9B and J9A
  • A404 southbound within the A4130 junction
Feed validity status
Active
Overall feed start
Tue, Sep 22, 2026 8:13 PM
Overall feed end
Wed, Sep 23, 2026 5:00 AM
Feed window length
8 hours 47 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

17 coordinate pairs
Description
A404 southbound between A4130 and A404(M)/A4
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
1 operational lane
Direction On Section
South Bound
Direction Relative
Aligned
Height Grade
Start1 End2
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{E316457F-ACB9-40E8-B0F7-2D78C00BA274}
Linear Element Type
B Carriageway
From Distance
0 m
To Distance
529 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.527262 -0.782355
51.526989 -0.781992
51.526943 -0.781931
51.526505 -0.781251
51.526257 -0.780811
51.526074 -0.780455
51.525908 -0.780085
51.525677 -0.779543
51.525511 -0.779087
51.52539 -0.778729
51.525297 -0.778415
51.525175 -0.777942
51.525062 -0.777441
51.525034 -0.777312
51.524871 -0.776379
51.524842 -0.776164
51.524813 -0.776006

Segment 2

5 coordinate pairs
Description
A404(M) southbound within J9B
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
2 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 3

9 coordinate pairs
Description
A404(M) southbound within J9B
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
2 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 4

9 coordinate pairs
Description
A404(M) southbound between J9B and J9A
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
2 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
294 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
51.513712 -0.759088

Segment 5

2 coordinate pairs
Description
A404(M) southbound within J9B
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
2 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 6

11 coordinate pairs
Description
A404 southbound within the A4130 junction
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
1 operational lane
Direction On Section
South Bound
Direction Relative
Aligned
Height Grade
Start1 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{7798FA4C-F1D7-4779-A91A-3B3F02DA5EC8}
Linear Element Type
B Carriageway
From Distance
0 m
To Distance
359 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.530085 -0.784846
51.529985 -0.784781
51.529831 -0.78468
51.529523 -0.784457
51.529143 -0.784179
51.52878 -0.783886
51.528099 -0.783284
51.527918 -0.783116
51.527618 -0.782807
51.52739 -0.782525
51.527262 -0.782355

Segment 7

3 coordinate pairs
Description
A404 southbound within the A4130 junction
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
1 operational lane
Direction On Section
South Bound
Direction Relative
Aligned
Height Grade
Start1 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{1E627A20-0ECA-4CB2-90FC-7A319A108315}
Linear Element Type
B Carriageway
From Distance
316 m
To Distance
361 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.530465 -0.785081
51.530365 -0.785026
51.530085 -0.784846

Segment 8

4 coordinate pairs
Description
A404(M) southbound between J9B and J9A
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
2 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 9

24 coordinate pairs
Description
A404 southbound between A4130 and A404(M)/A4
Carriageway
Dual Carriageway
Lane Usage
Cl1
Lane Number
1
Lane Status
Closed
Lane Direction
Aligned
Lanes Restricted
1 lane restricted
Operational Lanes
1 operational lane
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
0 m
To Distance
799 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.524813 -0.776006
51.524746 -0.775619
51.524582 -0.774513
51.524448 -0.773753
51.524297 -0.773007
51.524174 -0.772506
51.524071 -0.77212
51.523959 -0.771705
51.523829 -0.77129
51.523634 -0.770704
51.523541 -0.770459
51.523338 -0.76992
51.5232 -0.769592
51.52308 -0.769321
51.522933 -0.769008
51.522813 -0.768766
51.522648 -0.768454
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
Geometry type
MultiLineString
Geometry points
84
First coordinate pair
-0.782355, 51.527262
Road section segments
1
Road section points
84
View geometry JSON 
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            ],
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            ],
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            ],
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View road section coordinates 
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]
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
Tue, Sep 22, 2026 8:13 PM
Record versioned
Tue, Sep 22, 2026 10:41 PM
Coordinate source
Geometry

Driving on the A404? See every live closure, roadwork and planned restriction on this road.

A404 live closures

Related incidents

M4 eastbound lane 1 and 2 closure (47/0 to 44/8)

Cleared Roadworks National Highways
Windsor And Maidenhead M4 · M4 Eastbound Between J10 And J8

Cleared 3 days 16 hours ago

Started 8 Oct 2026, 19:11 Ended 8 Oct 2026, 23:55

M4 eastbound lane 1 and 2 closure (47/0 to 44/8)

Category: Road Maintenance
View update

A404(M) southbound lane 2 closure (49/4 to 48/6)

Cleared Roadworks National Highways
Windsor And Maidenhead A404(M) · A404(M) Southbound Within J9B

Cleared 3 days 21 hours ago

Started 8 Oct 2026, 19:00 Ended 8 Oct 2026, 19:00

A404(M) southbound lane 2 closure (49/4 to 48/6)

Category: Road Maintenance
View update

M4 eastbound lane 1 and 2 closure (47/0 to 44/8)

Cleared Roadworks National Highways
Windsor And Maidenhead M4 · M4 Eastbound Within J8

Cleared 3 days 11 hours ago

Started 8 Oct 2026, 19:00 Ended 9 Oct 2026, 05:00

M4 eastbound lane 1 and 2 closure (47/0 to 44/8)

Category: Road Maintenance
View update

A404(M) southbound lane 2 closure (49/4 to 48/6)

Cleared Roadworks National Highways
Windsor And Maidenhead A404(M) · A404(M) Southbound Within J9B

Cleared 3 days 17 hours ago

Started 8 Oct 2026, 18:40 Ended 8 Oct 2026, 22:55

A404(M) southbound lane 2 closure (49/4 to 48/6)

Category: Road Maintenance
View update

A404 southbound lane 1 closure (53.4 - 49.7)

Cleared Roadworks National Highways
Windsor And Maidenhead A404 · A404 Southbound Between A4130 And A404(M)/A4

Cleared 6 days 1 hour ago

Started 6 Oct 2026, 08:30 Ended 6 Oct 2026, 14:30

A404 southbound lane 1 closure (53.4 - 49.7)

Category: Authority Operation
View update

M4 eastbound lane 1 and 2 closure (47/0 to 44/8)

Cleared Roadworks National Highways
Windsor And Maidenhead M4 · M4 Eastbound Within J8

Cleared 6 days 11 hours ago

Started 5 Oct 2026, 19:00 Ended 6 Oct 2026, 05:00

M4 eastbound lane 1 and 2 closure (47/0 to 44/8)

Category: Road Maintenance
View update