Crash View

A40 Eastbound Denham Roundabout to Swakeleys Roundabout Lane 1 Closure

Cleared

A40 Eastbound Denham Roundabout to Swakeleys Roundabout Lane 1 Closure

Start time
Mon, Sep 21, 2026 9:00 PM
Expected end
Tue, Sep 22, 2026 4:30 AM
Duration
7 hours 30 minutes
Road
A40 – A40 Eastbound Between M40 And B467
Category
Road Maintenance
Direction
Eastbound
Carriageway
Dual Carriageway
Lanes affected
1 of 2 lanes affected, 1 of 3 lanes affected
Reason
Repair Work
Live incident
Active roadworks
Planned
Cleared
Hover or tap markers for full details

Move Insights

Thinking of moving to this area?

Check flood risk, planning history, EPC ratings and more with a Move Insights property report.

Flood risk assessment
Planning history
EPC ratings & more
Get a property report
First published
Tue, Sep 15, 2026 10:10 AM
Last updated
Tue, Sep 22, 2026 4:03 AM
Cleared
Tue, Sep 22, 2026 4:30 AM
  • Latest update: A40 Eastbound Denham Roundabout to Swakeleys Roundabout Lane 1 Closure
Coordinates
51.560237, -0.483189
Latitude span
51.559507 – 51.560879
Longitude span
-0.490448 – -0.474847
Bounding box centre
51.560193, -0.482648
Location descriptions
  • A40 eastbound between M40 and B467
  • M40 southbound within J1
Feed validity status
Planned
Overall feed start
Mon, Sep 21, 2026 9:00 PM
Overall feed end
Tue, Sep 22, 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
other
Contra-flow flag (raw)
false
Width restriction flag (raw)
false
Height restriction flag (raw)
false
Weight restriction flag (raw)
false

Segment 1

4 coordinate pairs
Description
A40 eastbound between M40 and B467
Carriageway
Dual Carriageway
Lanes Restricted
1 lane restricted
Operational Lanes
2 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 2

3 coordinate pairs
Description
M40 southbound within J1
Carriageway
Dual Carriageway
Lanes Restricted
1 lane restricted
Operational Lanes
3 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 3

3 coordinate pairs
Description
A40 eastbound between M40 and B467
Carriageway
Dual Carriageway
Lanes Restricted
1 lane restricted
Operational Lanes
2 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
159 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.559706 -0.477122
51.55969 -0.476942
51.559507 -0.474847

Segment 4

5 coordinate pairs
Description
A40 eastbound between M40 and B467
Carriageway
Dual Carriageway
Lanes Restricted
1 lane restricted
Operational Lanes
2 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

2 coordinate pairs
Description
A40 eastbound between M40 and B467
Carriageway
Dual Carriageway
Lanes Restricted
1 lane restricted
Operational Lanes
2 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
Geometry type
MultiLineString
Geometry points
17
First coordinate pair
-0.488952, 51.560754
Road section segments
1
Road section points
17
View geometry JSON 
{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.488952,
                51.560754
            ],
            [
                -0.48668,
                51.560545
            ],
            [
                -0.486248,
                51.560503
            ],
            [
                -0.485122,
                51.560403
            ],
            [
                -0.490448,
                51.560879
            ],
            [
                -0.490103,
                51.56085
            ],
            [
                -0.488952,
                51.560754
            ],
            [
                -0.477122,
                51.559706
            ],
            [
                -0.476942,
                51.55969
            ],
            [
                -0.474847,
                51.559507
            ],
            [
                -0.483262,
                51.560238
            ],
            [
                -0.480339,
                51.559979
            ],
            [
                -0.480193,
                51.559966
            ],
            [
                -0.479488,
                51.559912
            ],
            [
                -0.477122,
                51.559706
            ],
            [
                -0.485122,
                51.560403
            ],
            [
                -0.483262,
                51.560238
            ]
        ]
    ]
}
View road section coordinates 
[
    [
        [
            -0.488952,
            51.560754
        ],
        [
            -0.48668,
            51.560545
        ],
        [
            -0.486248,
            51.560503
        ],
        [
            -0.485122,
            51.560403
        ],
        [
            -0.490448,
            51.560879
        ],
        [
            -0.490103,
            51.56085
        ],
        [
            -0.488952,
            51.560754
        ],
        [
            -0.477122,
            51.559706
        ],
        [
            -0.476942,
            51.55969
        ],
        [
            -0.474847,
            51.559507
        ],
        [
            -0.483262,
            51.560238
        ],
        [
            -0.480339,
            51.559979
        ],
        [
            -0.480193,
            51.559966
        ],
        [
            -0.479488,
            51.559912
        ],
        [
            -0.477122,
            51.559706
        ],
        [
            -0.485122,
            51.560403
        ],
        [
            -0.483262,
            51.560238
        ]
    ]
]
Cause type
Road Maintenance
Detailed cause
Repair Work
Compliance
Mandatory
Probability
Probable
Validity status
Planned
Road management
Other
Feed provider
National Highways
Data source
Roadworks
Feed version
1
Record created
Tue, Sep 15, 2026 10:10 AM
Record versioned
Tue, Sep 22, 2026 4:03 AM
Coordinate source
Geometry

Driving on the A40? See every live closure, roadwork and planned restriction on this road.

A40 live closures

Related incidents

A4020 Oxford Road to A40 Denham Roundabout Westbound Jct 1 Exit Slip Lane 2 Closure

Planned Roadworks National Highways
Hillingdon A40 · Roundabout At M40 J1/A40

Expected to clear in 5 hours 33 minutes

Started 12 Oct 2026, 21:00 Expected clear 13 Oct 2026, 04:00

A4020 Oxford Road to A40 Denham Roundabout Westbound Jct 1 Exit Slip Lane 2 Closure

Category: Road Maintenance
View update

A40 Eastbound Jct 1 exit slip road lane 1 closure

Planned Roadworks National Highways
Hillingdon M40 · M40 Southbound Between J1A And J1

Expected to clear in 6 hours 3 minutes

Started 12 Oct 2026, 20:00 Expected clear 13 Oct 2026, 04:30

A40 Eastbound Jct 1 exit slip road lane 1 closure

Category: Road Maintenance
View update

Contra flow westbound with eastbound closed from Horseshoe Drive

Planned Roadworks National Highways
South Gloucestershire A40 · A40 Eastbound Between A48 And A417 Near Gloucester (West)

Expected to clear in 6 days 21 hours

Started 8 Oct 2026, 20:00 Expected clear 19 Oct 2026, 20:00

contra flow westbound with eastbound closed from Horseshoe Drive

Category: Road Maintenance
View update

Contra flow westbound with eastbound closed from Horseshoe Drive

Active Roadworks National Highways
South Gloucestershire A40 · A40 Eastbound Between A48 And A417 Near Gloucester (West)

Expected to clear in 2 months 3 weeks

Started 28 Jul 2026, 02:40 Expected clear 4 Jan 2027, 21:00

contra flow westbound with eastbound closed from Horseshoe Drive

Category: Road Maintenance
View update

A40 eastbound lane 2 closure

Cleared Roadworks National Highways
South Gloucestershire A40 · A40 Eastbound Between A417 Near Gloucester (North) And M5

Cleared 21 minutes 25 seconds ago

Started 12 Oct 2026, 20:00 Ended 12 Oct 2026, 22:05

A40 eastbound lane 2 closure

Category: Road Maintenance
View update

A40 Eastbound Jct 1 exit slip road lane 1 closure

Cleared Roadworks National Highways
Hillingdon M40 · M40 Southbound Between J1A And J1

Cleared 1 day 17 hours ago

Started 10 Oct 2026, 20:00 Ended 11 Oct 2026, 04:30

A40 Eastbound Jct 1 exit slip road lane 1 closure

Category: Road Maintenance
View update