M4 Eastbound Jct 4B exit slip road closure

Cleared

Start time: Thu, Sep 17, 2026 9:00 PM
Expected end: Fri, Sep 18, 2026 4:30 AM
Duration: 2 seconds
Road: M4 – Link Road From M4 J4B Eastbound To M25 J15
Category: Road Maintenance
Direction: Eastbound
Reason: Roadworks

Live incident

Active roadworks

Planned

Cleared

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First published: Thu, Sep 17, 2026 12:49 AM
Last updated: Thu, Sep 17, 2026 9:39 AM
Cleared: Thu, Sep 17, 2026 9:00 PM

Latest update: M4 Eastbound Jct 4B exit slip road closure

Coordinates: 51.495907, -0.499853
Latitude span: 51.494215 – 51.497983
Longitude span: -0.505777 – -0.496373
Bounding box centre: 51.496099, -0.501075
Location descriptions: link road from M4 J4B eastbound to M25 J15

link road from M4 J4B eastbound to M25 J15 clockwise

link road from M4 J4B to M25 J15 clockwise

Feed validity status: Planned
Overall feed start: Thu, Sep 17, 2026 9:00 PM
Overall feed end: Fri, Sep 18, 2026 4:30 AM
Feed window length: 7 hours 30 minutes
Probability code (raw): probable
Compliance option (raw): mandatory
Source identification (raw): roadworks

Management type value: carriagewayClosures (Carriageway Closures)
Contra-flow flag (raw): false
Width restriction flag (raw): false
Height restriction flag (raw): false
Weight restriction flag (raw): false

Segment 1

10 coordinate pairs

Description: link road from M4 J4B eastbound to M25 J15
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 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: {F8ED4782-79F0-478D-801B-C850EBB05D33}
Linear Element Type: A Carriageway Entry Slip
From Distance: 0 m
To Distance: 373 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.494215 -0.505777
51.494656 -0.50327
51.494672 -0.503173
51.494787 -0.502477
51.494917 -0.501713
51.49494 -0.50159
51.494993 -0.50131
51.495054 -0.501031
51.495164 -0.500675
51.49518 -0.500639

Segment 2

3 coordinate pairs

Description: link road from M4 J4B eastbound to M25 J15
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 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: {21298787-4F37-429A-9C6E-F407918FDCAF}
Linear Element Type: A Carriageway Entry Slip
From Distance: 0 m
To Distance: 115 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.49518 -0.500639
51.495322 -0.500313
51.495797 -0.499309

Segment 3

8 coordinate pairs

Description: link road from M4 J4B eastbound to M25 J15 clockwise
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: Clockwise
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M25
Linear Element Model: The Network Model
Linear Element Id: {B7136B54-64DB-48D4-8DB6-5A4630DF59FD}
Linear Element Type: A Carriageway Entry Slip
From Distance: 0 m
To Distance: 317 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.495797 -0.499309
51.496003 -0.498993
51.496344 -0.498391
51.496663 -0.497906
51.497018 -0.497428
51.497397 -0.496996
51.497816 -0.496554
51.497978 -0.496377

Segment 4

2 coordinate pairs

Description: link road from M4 J4B to M25 J15 clockwise
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: Clockwise
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M25
Linear Element Model: The Network Model
Linear Element Id: {EAB90281-C8F1-4B6D-B9A2-418B8AEC6B50}
Linear Element Type: A Carriageway Entry Slip
From Distance: 0 m
To Distance: 0 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.497978 -0.496377
51.497983 -0.496373

Geometry type: MultiLineString
Geometry points: 23
First coordinate pair: -0.505777, 51.494215
Road section segments: 1
Road section points: 23

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.505777,
                51.494215
            ],
            [
                -0.50327,
                51.494656
            ],
            [
                -0.503173,
                51.494672
            ],
            [
                -0.502477,
                51.494787
            ],
            [
                -0.501713,
                51.494917
            ],
            [
                -0.50159,
                51.49494
            ],
            [
                -0.50131,
                51.494993
            ],
            [
                -0.501031,
                51.495054
            ],
            [
                -0.500675,
                51.495164
            ],
            [
                -0.500639,
                51.49518
            ],
            [
                -0.500639,
                51.49518
            ],
            [
                -0.500313,
                51.495322
            ],
            [
                -0.499309,
                51.495797
            ],
            [
                -0.499309,
                51.495797
            ],
            [
                -0.498993,
                51.496003
            ],
            [
                -0.498391,
                51.496344
            ],
            [
                -0.497906,
                51.496663
            ],
            [
                -0.497428,
                51.497018
            ],
            [
                -0.496996,
                51.497397
            ],
            [
                -0.496554,
                51.497816
            ],
            [
                -0.496377,
                51.497978
            ],
            [
                -0.496377,
                51.497978
            ],
            [
                -0.496373,
                51.497983
            ]
        ]
    ]
}

View road section coordinates

Cause type: Road Maintenance
Detailed cause: Roadworks
Compliance: Mandatory
Probability: Probable
Validity status: Planned
Road management: Carriageway Closures