A40 Anticlockwise Jct Denham Rbt Lane 1 closure pt2

Cleared

Start time: Wed, May 13, 2026 9:00 PM
Expected end: Thu, May 14, 2026 4:30 AM
Duration: 7 hours 30 minutes
Road: A40 – Roundabout At M40 J1/A40
Category: Road Maintenance
Direction: Clockwise
Carriageway: Dual Carriageway
Lanes affected: 1 of 1 lanes affected, 1 of 3 lanes affected
Reason: Repair Work

Active

Planned

Cleared

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First published: Wed, May 13, 2026 8:48 PM
Last updated: Wed, May 13, 2026 11:24 PM
Cleared: Thu, May 14, 2026 4:30 AM

Latest update: A40 Anticlockwise Jct Denham Rbt Lane 1 closure pt2

Coordinates: 51.562280, -0.497921
Latitude span: 51.561981 – 51.562633
Longitude span: -0.498268 – -0.497552
Bounding box centre: 51.562307, -0.497910
Location descriptions: roundabout at M40 J1/A40

Feed validity status: Active
Overall feed start: Wed, May 13, 2026 9:00 PM
Overall feed end: Thu, May 14, 2026 4:30 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

2 coordinate pairs

Description: roundabout at M40 J1/A40
Carriageway: Dual Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: Clockwise
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A40
Linear Element Model: The Network Model
Linear Element Id: {7E3245F9-FDA3-44ED-A204-D956D43713DC}
Linear Element Type: Other
From Distance: 13 m
To Distance: 22 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.561981 -0.498268
51.562051 -0.498215

Segment 2

2 coordinate pairs

Description: roundabout at M40 J1/A40
Carriageway: Dual Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: Clockwise
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A40
Linear Element Model: The Network Model
Linear Element Id: {A2317FCF-EDCE-47B6-B43B-F489D7D70C5C}
Linear Element Type: Other
From Distance: 0 m
To Distance: 11 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.562051 -0.498215
51.562121 -0.498097

Segment 3

4 coordinate pairs

Description: roundabout at M40 J1/A40
Carriageway: Single Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 operational lanes
Direction On Section: Clockwise
Direction Relative: Both
Height Grade: Start1 End1
Linear Element Road: A40
Linear Element Model: The Network Model
Linear Element Id: {05C9EE3B-D4CB-4D71-A07C-33CE63B9DD3D}
Linear Element Type: Other
From Distance: 0 m
To Distance: 42 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.562121 -0.498097
51.562325 -0.49786
51.562361 -0.49781
51.562422 -0.497724

Segment 4

3 coordinate pairs

Description: roundabout at M40 J1/A40
Carriageway: Dual Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: Clockwise
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A40
Linear Element Model: The Network Model
Linear Element Id: {43F990DC-B3EF-44C8-851B-491F68920039}
Linear Element Type: Other
From Distance: 0 m
To Distance: 26 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.562422 -0.497724
51.562588 -0.49757
51.562633 -0.497552

Geometry type: MultiLineString
Geometry points: 11
First coordinate pair: -0.498268, 51.561981
Road section segments: 1
Road section points: 11

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.498268,
                51.561981
            ],
            [
                -0.498215,
                51.562051
            ],
            [
                -0.498215,
                51.562051
            ],
            [
                -0.498097,
                51.562121
            ],
            [
                -0.498097,
                51.562121
            ],
            [
                -0.49786,
                51.562325
            ],
            [
                -0.49781,
                51.562361
            ],
            [
                -0.497724,
                51.562422
            ],
            [
                -0.497724,
                51.562422
            ],
            [
                -0.49757,
                51.562588
            ],
            [
                -0.497552,
                51.562633
            ]
        ]
    ]
}

View road section coordinates

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