M4 Eastbound Jct 4 entry slip road and fast link closure

Cleared

Start time: Mon, Feb 16, 2026 10:00 PM
Expected end: Tue, Feb 17, 2026 5:30 AM
Duration: 7 hours 30 minutes
Road: M4 – M4 Fast Slip From A408 Southbound To M4 J4 Eastbound Access
Category: Road Maintenance
Direction: Eastbound
Reason: Repair Work

Live incident

Active roadworks

Planned

Cleared

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First published: Fri, Feb 6, 2026 11:30 AM
Last updated: Mon, Feb 16, 2026 8:07 PM
Cleared: Tue, Feb 17, 2026 5:30 AM

Latest update: M4 Eastbound Jct 4 entry slip road and fast link closure

Coordinates: 51.496232, -0.451560
Latitude span: 51.495175 – 51.497331
Longitude span: -0.452963 – -0.445715
Bounding box centre: 51.496253, -0.449339
Location descriptions: M4 fast slip from A408 southbound to M4 J4 eastbound access

connector at M4 J4/M4 spur (Heathrow)

connector at A408/M4 J4/M4 spur (Heathrow)

M4 J4 eastbound access

Feed validity status: Planned
Overall feed start: Mon, Feb 16, 2026 10:00 PM
Overall feed end: Tue, Feb 17, 2026 5:30 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

9 coordinate pairs

Description: M4 fast slip from A408 southbound to M4 J4 eastbound access
Lanes Restricted: 1 lane 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: {71F83347-4EB9-4DB1-A17A-78DAC2794214}
Linear Element Type: B Carriageway Entry Slip
From Distance: 0 m
To Distance: 116 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.496817 -0.452963
51.496628 -0.452912
51.496528 -0.452858
51.496446 -0.452789
51.496401 -0.452747
51.496327 -0.452634
51.496152 -0.452309
51.496072 -0.452094
51.496046 -0.451972

Segment 2

5 coordinate pairs

Description: connector at M4 J4/M4 spur (Heathrow)
Lanes Restricted: 1 lane 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: {CE611F52-246C-4E9E-A57E-B9A5B187F1B8}
Linear Element Type: B Carriageway Entry Slip
From Distance: 45 m
To Distance: 103 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.496106 -0.452364
51.496055 -0.452213
51.49604 -0.452164
51.49602 -0.452047
51.49596 -0.451574

Segment 3

3 coordinate pairs

Description: connector at A408/M4 J4/M4 spur (Heathrow)
Lanes Restricted: 1 lane 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: {4D731291-3572-4B19-9B42-7DB998A0EED5}
Linear Element Type: A Carriageway Entry Slip
From Distance: 15 m
To Distance: 36 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.497331 -0.452735
51.497309 -0.45276
51.497176 -0.452908

Segment 4

6 coordinate pairs

Description: M4 J4 eastbound access
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: {B414840E-AFE8-443B-99C4-55D908B27479}
Linear Element Type: B Carriageway Entry Slip
From Distance: 0 m
To Distance: 416 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.49596 -0.451574
51.495932 -0.451314
51.495799 -0.450059
51.495594 -0.44815
51.495453 -0.447031
51.495175 -0.445715

Geometry type: MultiLineString
Geometry points: 23
First coordinate pair: -0.452963, 51.496817
Road section segments: 1
Road section points: 23

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.452963,
                51.496817
            ],
            [
                -0.452912,
                51.496628
            ],
            [
                -0.452858,
                51.496528
            ],
            [
                -0.452789,
                51.496446
            ],
            [
                -0.452747,
                51.496401
            ],
            [
                -0.452634,
                51.496327
            ],
            [
                -0.452309,
                51.496152
            ],
            [
                -0.452094,
                51.496072
            ],
            [
                -0.451972,
                51.496046
            ],
            [
                -0.452364,
                51.496106
            ],
            [
                -0.452213,
                51.496055
            ],
            [
                -0.452164,
                51.49604
            ],
            [
                -0.452047,
                51.49602
            ],
            [
                -0.451574,
                51.49596
            ],
            [
                -0.452735,
                51.497331
            ],
            [
                -0.45276,
                51.497309
            ],
            [
                -0.452908,
                51.497176
            ],
            [
                -0.451574,
                51.49596
            ],
            [
                -0.451314,
                51.495932
            ],
            [
                -0.450059,
                51.495799
            ],
            [
                -0.44815,
                51.495594
            ],
            [
                -0.447031,
                51.495453
            ],
            [
                -0.445715,
                51.495175
            ]
        ]
    ]
}

View road section coordinates

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