Crash View

A404 northbound lane 1 closure (55/3 to M40 Jct 4 Roundabout)

Cleared

A404 northbound lane 1 closure (55/3 to M40 Jct 4 Roundabout)

Start time
Wed, Jul 29, 2026 8:49 PM
Expected end
Thu, Jul 30, 2026 5:00 AM
Duration
3 hours 36 minutes 2 seconds
Road
A404 – A404 Northbound Within The A4155 Junction
Category
Road Maintenance
Direction
Northbound
Carriageway
Dual Carriageway
Lanes affected
Lane 1 closed, 1 of 1 lanes affected
Reason
Maintenance Work
Live incident
Active roadworks
Planned
Cleared
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First published
Wed, Jul 29, 2026 8:49 PM
Last updated
Thu, Jul 30, 2026 12:01 AM
Cleared
Thu, Jul 30, 2026 12:25 AM
  • Latest update: A404 northbound lane 1 closure (55/3 to M40 Jct 4 Roundabout)
Coordinates
51.588193, -0.760383
Latitude span
51.565108 – 51.611443
Longitude span
-0.768055 – -0.756302
Bounding box centre
51.588276, -0.762179
Location descriptions
  • A404 northbound within the A4155 junction
  • A404 northbound between A4155 and M40
  • A404 northbound between A308 and A4155
  • A404 northbound within M40 junction
Feed validity status
Active
Overall feed start
Wed, Jul 29, 2026 8:49 PM
Overall feed end
Thu, Jul 30, 2026 5:00 AM
Feed window length
8 hours 11 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

3 coordinate pairs
Description
A404 northbound within the A4155 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
North Bound
Direction Relative
Aligned
Height Grade
Start1 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{0D3A7735-BB8E-4E13-9028-ACE1FD31D854}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
319 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.578029 -0.756365
51.579253 -0.75657
51.580879 -0.756872

Segment 2

2 coordinate pairs
Description
A404 northbound between A4155 and M40
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
North Bound
Direction Relative
Aligned
Height Grade
Start2 End2
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{EBAD28E7-1BA8-4245-9814-732DBDE1654B}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
6 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.606919 -0.765742
51.606973 -0.765769

Segment 3

2 coordinate pairs
Description
A404 northbound between A308 and A4155
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
North Bound
Direction Relative
Aligned
Height Grade
Start2 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{5D220EF5-20E5-4A25-BFE5-8FB1EB6E4098}
Linear Element Type
A Carriageway
From Distance
105 m
To Distance
243 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.565108 -0.762687
51.566259 -0.761959

Segment 4

6 coordinate pairs
Description
A404 northbound within M40 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
North Bound
Direction Relative
Aligned
Height Grade
Start1 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{A455B541-3E68-4819-8B00-2E9F7843D27A}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
262 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.609288 -0.76678
51.611192 -0.767604
51.611296 -0.767706
51.611366 -0.767801
51.611429 -0.767967
51.611443 -0.768055

Segment 5

17 coordinate pairs
Description
A404 northbound between A308 and A4155
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
North Bound
Direction Relative
Aligned
Height Grade
Start2 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{865BF03F-BBB1-44C5-9165-D97520DF022F}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
866 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.570532 -0.759196
51.570836 -0.759009
51.571224 -0.758763
51.571971 -0.758281
51.572778 -0.757769
51.573278 -0.757459
51.573719 -0.757207
51.574103 -0.757012
51.574601 -0.756812
51.575287 -0.756584
51.575486 -0.756522
51.575797 -0.756456
51.576429 -0.756349
51.577156 -0.756302
51.57775 -0.756344
51.577965 -0.756352
51.578029 -0.756365

Segment 6

3 coordinate pairs
Description
A404 northbound between A4155 and M40
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
North Bound
Direction Relative
Aligned
Height Grade
Start2 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{47025BED-3C3B-48A0-A41E-6F924C78C13E}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
266 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.606973 -0.765769
51.608149 -0.766307
51.609288 -0.76678

Segment 7

2 coordinate pairs
Description
A404 northbound within the A4155 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
North Bound
Direction Relative
Aligned
Height Grade
Start1 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{264B9E8E-F8B2-477A-99FF-F575840A1F9F}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
82 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.580879 -0.756872
51.581615 -0.757004

Segment 8

2 coordinate pairs
Description
A404 northbound between A308 and A4155
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
North Bound
Direction Relative
Aligned
Height Grade
Start2 End2
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{86415CC5-514C-4DBC-9AC9-5D11DAFC73F3}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
12 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.570434 -0.759271
51.570532 -0.759196

Segment 9

14 coordinate pairs
Description
A404 northbound between A4155 and M40
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
North Bound
Direction Relative
Aligned
Height Grade
Start1 End2
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{A9DF9FD6-891D-41DD-906C-46EA6AB977C8}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
852 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.583855 -0.757453
51.585966 -0.757842
51.586673 -0.757971
51.58711 -0.758046
51.587505 -0.75812
51.588005 -0.758207
51.588438 -0.758284
51.588847 -0.758366
51.589349 -0.758478
51.589775 -0.758584
51.590115 -0.758679
51.590503 -0.75878
51.5912 -0.759015
51.591444 -0.759093

Segment 10

33 coordinate pairs
Description
A404 northbound between A4155 and M40
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
North Bound
Direction Relative
Aligned
Height Grade
Start2 End2
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{264B0EC8-C6E7-4B3E-952C-BD3FA86F60AE}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
1,781 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.591444 -0.759093
51.591766 -0.759236
51.592067 -0.759358
51.592418 -0.759507
51.593076 -0.75979
51.593268 -0.759872
51.593518 -0.75998
51.5937 -0.760066
51.594148 -0.760256
51.594638 -0.760457
51.594876 -0.760552
51.595265 -0.76071
51.595637 -0.760865
51.595983 -0.761021
51.596334 -0.761172
51.596562 -0.761269
51.596622 -0.761294
51.596916 -0.76142
51.59726 -0.761567
51.597655 -0.761736
51.597973 -0.761876
51.598278 -0.762012
51.598677 -0.762182
51.599107 -0.762371
51.599495 -0.762538
51.599852 -0.762693
51.600366 -0.76292
51.600784 -0.763098
51.601133 -0.763252
51.601532 -0.763427
51.602315 -0.763754
51.605844 -0.76528
51.606919 -0.765742

Segment 11

4 coordinate pairs
Description
A404 northbound within the A4155 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
North Bound
Direction Relative
Aligned
Height Grade
Start1 End1
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{59284ABC-DDD5-4C18-816D-6BAFA987463C}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
251 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.581615 -0.757004
51.582151 -0.757106
51.583303 -0.757317
51.583855 -0.757453

Segment 12

8 coordinate pairs
Description
A404 northbound between A308 and A4155
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
North Bound
Direction Relative
Aligned
Height Grade
Start1 End2
Linear Element Road
A404
Linear Element Model
The Network Model
Linear Element Id
{E590B8E5-6B97-4877-939C-B54DB9E17D22}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
500 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.566259 -0.761959
51.566369 -0.761889
51.567362 -0.761259
51.568355 -0.760616
51.568818 -0.760325
51.569336 -0.759993
51.57022 -0.759406
51.570434 -0.759271
Geometry type
MultiLineString
Geometry points
96
First coordinate pair
-0.756365, 51.578029
Road section segments
1
Road section points
96
View geometry JSON 
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            ],
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            ],
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            ],
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            ],
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                -0.760457,
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            ],
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            ],
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            ],
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                -0.760865,
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            ],
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                -0.761021,
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            ],
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            ],
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            ],
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            ],
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            ],
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            ],
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            ],
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            ],
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            ],
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            ],
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                -0.759406,
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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
Wed, Jul 29, 2026 8:49 PM
Record versioned
Thu, Jul 30, 2026 12:01 AM
Coordinate source
Geometry

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

A404 live closures

Related incidents

M40 Southbound Jct 5 to Jct 4 lane 3 and 2 closure

Planned Roadworks National Highways
Wycombe M40 · M40 Southbound Between J5 And J4

Starts in 17 hours 29 minutes

Starts 5 Aug 2026, 21:15 Expected clear 6 Aug 2026, 05:00

M40 Southbound Jct 5 to Jct 4 lane 3 and 2 closure

Category: Road Maintenance
View update

M40 northbound, Jct 5 exit slip road closure

Planned Roadworks National Highways
Wycombe M40 · M40 J5 Northbound Exit

Starts in 17 hours 29 minutes

Starts 5 Aug 2026, 21:15 Expected clear 6 Aug 2026, 05:00

M40 northbound, Jct 5 exit slip road closure

Category: Road Maintenance
View update

M40 Southbound Jct 5 to Jct 4 lane 3 closure

Cleared Roadworks National Highways
Wycombe M40 · M40 Southbound Between J6 And J5

Cleared 6 hours 30 minutes ago

Started 4 Aug 2026, 21:15 Ended 4 Aug 2026, 21:15

M40 Southbound Jct 5 to Jct 4 lane 3 closure

Category: Road Maintenance
View update

M40 northbound, Jct 5 exit slip road closure

Cleared Roadworks National Highways
Wycombe M40 · M40 J5 Northbound Exit

Cleared 6 hours 30 minutes ago

Started 4 Aug 2026, 21:15 Ended 4 Aug 2026, 21:15

M40 northbound, Jct 5 exit slip road closure

Category: Road Maintenance
View update

M40 Southbound Jct 5 to Jct 4 lane 3 and 2 closure

Cleared Roadworks National Highways
Wycombe M40 · M40 Southbound Between J5 And J4

Cleared 5 minutes 22 seconds ago

Started 4 Aug 2026, 21:15 Ended 5 Aug 2026, 03:40

M40 Southbound Jct 5 to Jct 4 lane 3 and 2 closure

Category: Road Maintenance
View update

M40 northbound, Jct 5 exit slip road closure

Cleared Roadworks National Highways
Wycombe M40 · M40 J5 Northbound Exit

Cleared 1 day 6 hours ago

Started 3 Aug 2026, 21:15 Ended 3 Aug 2026, 21:15

M40 northbound, Jct 5 exit slip road closure

Category: Road Maintenance
View update