A40 Eastbound Denham Roundabout exit slip road lane 2 closure

Planned

Start time: Mon, Apr 20, 2026 10:00 PM
Expected end: Tue, Apr 21, 2026 5:00 AM
Duration: 7 hours
Road: M40 – M40 J1 Southbound Exit
Category: Road Maintenance
Direction: Southbound
Lanes affected: Lane 2 closed, 1 of 1 lanes affected
Reason: Litter Clearance

Active

Planned

Cleared

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First published: Thu, Mar 26, 2026 12:16 PM
Last updated: Tue, Apr 21, 2026 4:29 AM
Cleared: Tue, Apr 21, 2026 5:00 AM

Latest update: A40 Eastbound Denham Roundabout exit slip road lane 2 closure

Coordinates: 51.562065, -0.500161
Latitude span: 51.561876 – 51.562203
Longitude span: -0.502819 – -0.498404
Bounding box centre: 51.562040, -0.500612
Location descriptions: M40 J1 southbound exit

Feed validity status: Planned
Overall feed start: Mon, Apr 20, 2026 10:00 PM
Overall feed end: Tue, Apr 21, 2026 5:00 AM
Feed window length: 7 hours
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

3 coordinate pairs

Description: M40 J1 southbound exit
Lane Usage: Cl2
Lane Number: 2
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: 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: 27 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.56195 -0.498781
51.561892 -0.498484
51.561876 -0.498404

Segment 2

9 coordinate pairs

Description: M40 J1 southbound exit
Lane Usage: Cl2
Lane Number: 2
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: M40
Linear Element Model: The Network Model
Linear Element Id: {B58F8180-E638-409C-B3AA-C7F41C33E136}
Linear Element Type: B Carriageway Exit Slip
From Distance: 315 m
To Distance: 598 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.562197 -0.502819
51.562203 -0.502394
51.562192 -0.501557
51.562177 -0.501053
51.562166 -0.500894
51.56209 -0.499873
51.562059 -0.499585
51.562029 -0.499312
51.56195 -0.498781

Geometry type: MultiLineString
Geometry points: 12
First coordinate pair: -0.498781, 51.561950
Road section segments: 1
Road section points: 12

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.498781,
                51.56195
            ],
            [
                -0.498484,
                51.561892
            ],
            [
                -0.498404,
                51.561876
            ],
            [
                -0.502819,
                51.562197
            ],
            [
                -0.502394,
                51.562203
            ],
            [
                -0.501557,
                51.562192
            ],
            [
                -0.501053,
                51.562177
            ],
            [
                -0.500894,
                51.562166
            ],
            [
                -0.499873,
                51.56209
            ],
            [
                -0.499585,
                51.562059
            ],
            [
                -0.499312,
                51.562029
            ],
            [
                -0.498781,
                51.56195
            ]
        ]
    ]
}

View road section coordinates

Cause type: Road Maintenance
Detailed cause: Litter Clearance
Compliance: Mandatory
Probability: Probable
Validity status: Planned
Road management: Other