A40 Eastbound Denham entry slip road lane 1 closure

Cleared

Start time: Tue, Nov 3, 2026 10:00 PM
Expected end: Wed, Nov 4, 2026 5:30 AM
Duration: 7 hours 30 minutes
Road: M40 – M40 J1 Southbound Exit
Category: Road Maintenance
Direction: Southbound
Lanes affected: 1 of 1 lanes affected
Reason: Maintenance 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: Wed, Aug 12, 2026 9:07 AM
Last updated: Fri, Oct 30, 2026 12:50 AM
Cleared: Wed, Nov 4, 2026 5:30 AM

Latest update: A40 Eastbound Denham entry slip road lane 1 closure

Coordinates: 51.561976, -0.499012
Latitude span: 51.561878 – 51.562075
Longitude span: -0.499732 – -0.498412
Bounding box centre: 51.561977, -0.499072
Location descriptions: M40 J1 southbound exit

Feed validity status: Suspended
Overall feed start: Tue, Nov 3, 2026 10:00 PM
Overall feed end: Wed, Nov 4, 2026 5:30 AM
Feed window length: 7 hours 30 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

4 coordinate pairs

Description: M40 J1 southbound exit
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: M40
Linear Element Model: The Network Model
Linear Element Id: {B58F8180-E638-409C-B3AA-C7F41C33E136}
Linear Element Type: B Carriageway Exit Slip
From Distance: 530 m
To Distance: 598 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.562075 -0.499732
51.562059 -0.499585
51.562029 -0.499312
51.56195 -0.498781

Segment 2

3 coordinate pairs

Description: M40 J1 southbound exit
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: M40
Linear Element Model: The Network Model
Linear Element Id: {51B92E59-EB65-46B5-9609-84ABF5D94F92}
Linear Element Type: B Carriageway Exit Slip
From Distance: 0 m
To Distance: 26 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.56195 -0.498781
51.561892 -0.498484
51.561878 -0.498412

Geometry type: MultiLineString
Geometry points: 7
First coordinate pair: -0.499732, 51.562075
Road section segments: 1
Road section points: 7

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.499732,
                51.562075
            ],
            [
                -0.499585,
                51.562059
            ],
            [
                -0.499312,
                51.562029
            ],
            [
                -0.498781,
                51.56195
            ],
            [
                -0.498781,
                51.56195
            ],
            [
                -0.498484,
                51.561892
            ],
            [
                -0.498412,
                51.561878
            ]
        ]
    ]
}

View road section coordinates

Cause type: Road Maintenance
Detailed cause: Maintenance Work
Compliance: Mandatory
Probability: Certain
Validity status: Suspended
Road management: Other