M4 Westbound Jct 4 to M4 Southbound Jct 4A link road closure

Cleared

Start time: Thu, Sep 17, 2026 9:00 PM
Expected end: Fri, Sep 18, 2026 4:30 AM
Duration: 2 hours 15 minutes 2 seconds
Road: M4 – M4 Spur (Heathrow) Southbound Between M4 And J4A
Category: Road Maintenance
Direction: Westbound
Carriageway: Dual Carriageway
Reason: Maintenance Work

Live incident

Active roadworks

Planned

Cleared

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First published: Thu, Sep 17, 2026 9:31 PM
Last updated: Thu, Sep 17, 2026 10:47 PM
Cleared: Thu, Sep 17, 2026 11:15 PM

Latest update: M4 Westbound Jct 4 to M4 Southbound Jct 4A link road closure

Coordinates: 51.494836, -0.452406
Latitude span: 51.493620 – 51.495253
Longitude span: -0.453427 – -0.450092
Bounding box centre: 51.494437, -0.451760
Location descriptions: M4 spur (Heathrow) southbound between M4 and J4A

M4 J4 westbound exit

Feed validity status: Active
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): certain
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

3 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
Lanes Restricted: 4 lanes restricted
Operational Lanes: 0 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: {C8EEE3F4-E88A-41BB-8149-9911106FF879}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 91 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.494437 -0.453318
51.494221 -0.453365
51.49362 -0.453427

Segment 2

8 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Lanes Restricted: 3 lanes restricted
Operational Lanes: 0 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: {225BE00A-BF15-4520-9933-4807CFA219CB}
Linear Element Type: A Carriageway Exit Slip
From Distance: 0 m
To Distance: 151 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.495253 -0.451794
51.495232 -0.452145
51.495205 -0.452342
51.495164 -0.452487
51.495007 -0.452761
51.494818 -0.453073
51.494672 -0.453222
51.494437 -0.453318

Segment 3

3 coordinate pairs

Description: M4 J4 westbound exit
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 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: {5B534D79-4DB8-4FCB-9DB1-2E8551A00F71}
Linear Element Type: A Carriageway Exit Slip
From Distance: 309 m
To Distance: 427 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.495184 -0.450092
51.495203 -0.45054
51.495253 -0.451794

Geometry type: MultiLineString
Geometry points: 14
First coordinate pair: -0.453318, 51.494437
Road section segments: 1
Road section points: 14

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.453318,
                51.494437
            ],
            [
                -0.453365,
                51.494221
            ],
            [
                -0.453427,
                51.49362
            ],
            [
                -0.451794,
                51.495253
            ],
            [
                -0.452145,
                51.495232
            ],
            [
                -0.452342,
                51.495205
            ],
            [
                -0.452487,
                51.495164
            ],
            [
                -0.452761,
                51.495007
            ],
            [
                -0.453073,
                51.494818
            ],
            [
                -0.453222,
                51.494672
            ],
            [
                -0.453318,
                51.494437
            ],
            [
                -0.450092,
                51.495184
            ],
            [
                -0.45054,
                51.495203
            ],
            [
                -0.451794,
                51.495253
            ]
        ]
    ]
}

View road section coordinates

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