A40 Eastbound Denham Roundabout to Swakeleys carriageway closure
PlannedA40 Eastbound Denham Roundabout to Swakeleys carriageway closure
- Start time
- Tue, Jun 9, 2026 9:00 PM
- Expected end
- Wed, Jun 10, 2026 4:30 AM
- Duration
- 7 hours 30 minutes
- Road
- M40 – M40 Southbound Within J1
- Category
- Road Maintenance
- Direction
- Southbound
- Carriageway
- Dual Carriageway
- Reason
- Other
Active
Planned
Cleared
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- First published
- Wed, May 28, 2025 10:13 AM
- Last updated
- Tue, Jun 9, 2026 12:01 AM
- Cleared
- Wed, Jun 10, 2026 4:30 AM
- Latest update: A40 Eastbound Denham Roundabout to Swakeleys carriageway closure
- Coordinates
- 51.560468, -0.485372
- Latitude span
- 51.559528 – 51.561414
- Longitude span
- -0.493017 – -0.475080
- Bounding box centre
- 51.560471, -0.484049
- Location descriptions
-
- M40 southbound within J1
- A40 eastbound between M40 and B467
- A40 eastbound access from M40
- Feed validity status
- Planned
- Overall feed start
- Tue, Jun 9, 2026 9:00 PM
- Overall feed end
- Wed, Jun 10, 2026 4:30 AM
- Feed window length
- 7 hours 30 minutes
- Probability code (raw)
- probable
- 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
3 coordinate pairs- Description
- M40 southbound within J1
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 4 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- South Bound
- Direction Relative
- Aligned
- Height Grade
- Start2 End1
- Linear Element Road
- M40
- Linear Element Model
- The Network Model
- Linear Element Id
- {BF582C7F-CA75-4144-8A77-187F9CD1FF15}
- Linear Element Type
- B Carriageway
- From Distance
- 191 m
- To Distance
- 295 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.560879 -0.490448 51.56085 -0.490103 51.560754 -0.488952
Segment 2
4 coordinate pairs- Description
- A40 eastbound between M40 and B467
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 3 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- East Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End1
- Linear Element Road
- A40
- Linear Element Model
- The Network Model
- Linear Element Id
- {B22E61BC-D1AD-432A-886B-E69E47690DF4}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 265 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.560754 -0.488952 51.560545 -0.48668 51.560503 -0.486248 51.560407 -0.485166
Segment 3
2 coordinate pairs- Description
- A40 eastbound between M40 and B467
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 3 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- East Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End1
- Linear Element Road
- A40
- Linear Element Model
- The Network Model
- Linear Element Id
- {6F19826B-6229-4312-BDB3-60C2B4ACF6B9}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 130 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.560403 -0.485122 51.560238 -0.483262
Segment 4
5 coordinate pairs- Description
- A40 eastbound between M40 and B467
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 3 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- East Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End1
- Linear Element Road
- A40
- Linear Element Model
- The Network Model
- Linear Element Id
- {9C535FA2-4878-49C1-AB8D-C57FE3A02E29}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 429 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.560238 -0.483262 51.559979 -0.480339 51.559966 -0.480193 51.559912 -0.479488 51.559706 -0.477122
Segment 5
4 coordinate pairs- Description
- A40 eastbound between M40 and B467
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 3 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- East Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End1
- Linear Element Road
- A40
- Linear Element Model
- The Network Model
- Linear Element Id
- {B22E61BC-D1AD-432A-886B-E69E47690DF4}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 268 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.560754 -0.488952 51.560545 -0.48668 51.560503 -0.486248 51.560403 -0.485122
Segment 6
3 coordinate pairs- Description
- A40 eastbound access from M40
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- East Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End1
- Linear Element Road
- A40
- Linear Element Model
- The Network Model
- Linear Element Id
- {BF440181-01CA-4C93-AA1A-2C4282CBB030}
- Linear Element Type
- B Carriageway Entry Slip
- From Distance
- 0 m
- To Distance
- 281 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.561372 -0.492893 51.560998 -0.490445 51.560754 -0.488952
Segment 7
3 coordinate pairs- Description
- A40 eastbound between M40 and B467
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 3 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- East Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End1
- Linear Element Road
- A40
- Linear Element Model
- The Network Model
- Linear Element Id
- {177E2170-0EFE-4AAB-9E21-EAFEC64C25EE}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 142 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.559706 -0.477122 51.55969 -0.476942 51.559528 -0.47508
Segment 8
2 coordinate pairs- Description
- A40 eastbound access from M40
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- East Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End1
- Linear Element Road
- A40
- Linear Element Model
- The Network Model
- Linear Element Id
- {541770C4-7A25-4CCD-BB85-908AEEB3C09C}
- Linear Element Type
- B Carriageway Entry Slip
- From Distance
- 29 m
- To Distance
- 38 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.561414 -0.493017 51.561372 -0.492893
- Geometry type
- MultiLineString
- Geometry points
- 26
- First coordinate pair
- -0.490448, 51.560879
- Road section segments
- 1
- Road section points
- 26
View geometry JSON
{
"type": "MultiLineString",
"coordinates": [
[
[
-0.490448,
51.560879
],
[
-0.490103,
51.56085
],
[
-0.488952,
51.560754
],
[
-0.488952,
51.560754
],
[
-0.48668,
51.560545
],
[
-0.486248,
51.560503
],
[
-0.485166,
51.560407
],
[
-0.485122,
51.560403
],
[
-0.483262,
51.560238
],
[
-0.483262,
51.560238
],
[
-0.480339,
51.559979
],
[
-0.480193,
51.559966
],
[
-0.479488,
51.559912
],
[
-0.477122,
51.559706
],
[
-0.488952,
51.560754
],
[
-0.48668,
51.560545
],
[
-0.486248,
51.560503
],
[
-0.485122,
51.560403
],
[
-0.492893,
51.561372
],
[
-0.490445,
51.560998
],
[
-0.488952,
51.560754
],
[
-0.477122,
51.559706
],
[
-0.476942,
51.55969
],
[
-0.47508,
51.559528
],
[
-0.493017,
51.561414
],
[
-0.492893,
51.561372
]
]
]
}
View road section coordinates
[
[
[
-0.490448,
51.560879
],
[
-0.490103,
51.56085
],
[
-0.488952,
51.560754
],
[
-0.488952,
51.560754
],
[
-0.48668,
51.560545
],
[
-0.486248,
51.560503
],
[
-0.485166,
51.560407
],
[
-0.485122,
51.560403
],
[
-0.483262,
51.560238
],
[
-0.483262,
51.560238
],
[
-0.480339,
51.559979
],
[
-0.480193,
51.559966
],
[
-0.479488,
51.559912
],
[
-0.477122,
51.559706
],
[
-0.488952,
51.560754
],
[
-0.48668,
51.560545
],
[
-0.486248,
51.560503
],
[
-0.485122,
51.560403
],
[
-0.492893,
51.561372
],
[
-0.490445,
51.560998
],
[
-0.488952,
51.560754
],
[
-0.477122,
51.559706
],
[
-0.476942,
51.55969
],
[
-0.47508,
51.559528
],
[
-0.493017,
51.561414
],
[
-0.492893,
51.561372
]
]
]
- Cause type
- Road Maintenance
- Detailed cause
- Other
- Compliance
- Mandatory
- Probability
- Probable
- Validity status
- Planned
- Road management
- Carriageway Closures
- Feed provider
- National Highways
- Data source
- Roadworks
- Feed version
- 1
- Record created
- Wed, May 28, 2025 10:13 AM
- Record versioned
- Tue, Jun 9, 2026 12:01 AM
- Coordinate source
- Geometry
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