M4 Eastbound Jct 4b to Jct 4 Lane 1 closure

Cleared

Start time: Sat, Dec 13, 2025 10:00 PM
Expected end: Sun, Dec 14, 2025 5:00 AM
Duration: 7 hours
Road: M4 – M4 Eastbound Within J4B
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: 1 of 3 lanes affected, 1 of 4 lanes affected
Reason: Maintenance Work

Active

Planned

Cleared

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First published: Sat, Dec 13, 2025 9:48 PM
Last updated: Sun, Dec 14, 2025 12:10 AM
Cleared: Sun, Dec 14, 2025 5:00 AM

Latest update: M4 Eastbound Jct 4b to Jct 4 Lane 1 closure

Coordinates: 51.494730, -0.477727
Latitude span: 51.494418 – 51.495350
Longitude span: -0.486285 – -0.469397
Bounding box centre: 51.494884, -0.477841
Location descriptions: M4 eastbound within J4B

M4 eastbound between J4B and J4

Feed validity status: Active
Overall feed start: Sat, Dec 13, 2025 10:00 PM
Overall feed end: Sun, Dec 14, 2025 5:00 AM
Feed window length: 7 hours
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

7 coordinate pairs

Description: M4 eastbound within J4B
Carriageway: Dual Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {5C27A7BA-915A-4BD4-B24D-65363A14EB76}
Linear Element Type: B Carriageway
From Distance: 262 m
To Distance: 748 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.494472 -0.486285
51.494436 -0.485262
51.494422 -0.483828
51.494421 -0.483542
51.494419 -0.482978
51.494418 -0.482767
51.49452 -0.479278

Segment 2

11 coordinate pairs

Description: M4 eastbound between J4B and J4
Carriageway: Dual Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 4 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {6C74E352-01F1-450C-B9F1-385A3B48DFE5}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 692 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.49452 -0.479278
51.494574 -0.478019
51.494678 -0.476309
51.494685 -0.4762
51.494718 -0.475842
51.494926 -0.473726
51.495042 -0.472585
51.495069 -0.472335
51.495157 -0.471541
51.495308 -0.469916
51.49535 -0.469397

Geometry type: MultiLineString
Geometry points: 18
First coordinate pair: -0.486285, 51.494472
Road section segments: 1
Road section points: 18

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.486285,
                51.494472
            ],
            [
                -0.485262,
                51.494436
            ],
            [
                -0.483828,
                51.494422
            ],
            [
                -0.483542,
                51.494421
            ],
            [
                -0.482978,
                51.494419
            ],
            [
                -0.482767,
                51.494418
            ],
            [
                -0.479278,
                51.49452
            ],
            [
                -0.479278,
                51.49452
            ],
            [
                -0.478019,
                51.494574
            ],
            [
                -0.476309,
                51.494678
            ],
            [
                -0.4762,
                51.494685
            ],
            [
                -0.475842,
                51.494718
            ],
            [
                -0.473726,
                51.494926
            ],
            [
                -0.472585,
                51.495042
            ],
            [
                -0.472335,
                51.495069
            ],
            [
                -0.471541,
                51.495157
            ],
            [
                -0.469916,
                51.495308
            ],
            [
                -0.469397,
                51.49535
            ]
        ]
    ]
}

View road section coordinates

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