Single lane running

Active

single lane running

Start time: Mon, Aug 17, 2026 6:41 PM
Expected end: Tue, Aug 18, 2026 5:00 AM
Duration: 10 hours 19 minutes
Road: M4 – M4 Westbound Between J16 And J17
Category: Road Maintenance
Direction: Westbound
Carriageway: Dual Carriageway
Lanes affected: 2 of 2 lanes affected
Reason: Maintenance Work

Live incident

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First published: Mon, Aug 17, 2026 6:41 PM
Last updated: Tue, Aug 18, 2026 12:22 AM
Cleared: Tue, Aug 18, 2026 5:00 AM

Latest update: single lane running

Coordinates: 51.514797, -2.080137
Latitude span: 51.514368 – 51.515337
Longitude span: -2.086779 – -2.073932
Bounding box centre: 51.514853, -2.080356
Location descriptions: M4 westbound between J16 and J17

Feed validity status: Active
Overall feed start: Mon, Aug 17, 2026 6:41 PM
Overall feed end: Tue, Aug 18, 2026 5:00 AM
Feed window length: 10 hours 19 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

8 coordinate pairs

Description: M4 westbound between J16 and J17
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 2 operational lanes
Direction On Section: West Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {D3FD34C6-1DE5-4236-8E73-1138026802AF}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 674 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.514995 -2.077114
51.514884 -2.078486
51.514684 -2.080817
51.514601 -2.082008
51.514527 -2.083235
51.514427 -2.085246
51.514377 -2.086549
51.514368 -2.086779

Segment 2

4 coordinate pairs

Description: M4 westbound between J16 and J17
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 2 operational lanes
Direction On Section: West Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {9E6131FD-347E-431D-B190-05BAEF230191}
Linear Element Type: A Carriageway
From Distance: 2,815 m
To Distance: 3,039 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.515337 -2.073932
51.515246 -2.074656
51.515128 -2.075709
51.514995 -2.077114

Geometry type: MultiLineString
Geometry points: 12
First coordinate pair: -2.077114, 51.514995
Road section segments: 1
Road section points: 12

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -2.077114,
                51.514995
            ],
            [
                -2.078486,
                51.514884
            ],
            [
                -2.080817,
                51.514684
            ],
            [
                -2.082008,
                51.514601
            ],
            [
                -2.083235,
                51.514527
            ],
            [
                -2.085246,
                51.514427
            ],
            [
                -2.086549,
                51.514377
            ],
            [
                -2.086779,
                51.514368
            ],
            [
                -2.073932,
                51.515337
            ],
            [
                -2.074656,
                51.515246
            ],
            [
                -2.075709,
                51.515128
            ],
            [
                -2.077114,
                51.514995
            ]
        ]
    ]
}

View road section coordinates

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