M4 Southbound Jct 4 to Jct 4A lane 3 closure

Cleared

Start time: Sun, Oct 19, 2025 9:30 PM
Expected end: Mon, Oct 20, 2025 4:00 AM
Duration: 6 hours 30 minutes
Road: M4 – M4 Spur (Heathrow) Southbound Between M4 And J4A
Category: Road Maintenance
Direction: Westbound
Carriageway: Dual Carriageway
Lanes affected: Lane 3 closed, 1 of 2 lanes affected, 1 of 3 lanes affected
Reason: Roadworks

Live incident

Active roadworks

Planned

Cleared

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First published: Sun, Oct 19, 2025 9:16 PM
Last updated: Mon, Oct 20, 2025 3:28 AM
Cleared: Mon, Oct 20, 2025 4:00 AM

Latest update: M4 Southbound Jct 4 to Jct 4A lane 3 closure

Coordinates: 51.483159, -0.452571
Latitude span: 51.482010 – 51.485121
Longitude span: -0.452707 – -0.452457
Bounding box centre: 51.483566, -0.452582
Location descriptions: M4 spur (Heathrow) southbound between M4 and J4A

Feed validity status: Active
Overall feed start: Sun, Oct 19, 2025 9:30 PM
Overall feed end: Mon, Oct 20, 2025 4:00 AM
Feed window length: 6 hours 30 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

5 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
Lane Usage: Cl3
Lane Number: 3
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane 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: {3EF4B73F-9941-4CBE-B72B-4A1839974AEF}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 208 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.484725 -0.452466
51.484644 -0.452468
51.482976 -0.452619
51.482857 -0.45263
51.482856 -0.45263

Segment 2

3 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
Lane Usage: Cl3
Lane Number: 3
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 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: {296942E5-19E8-4234-A758-FDA48F19384D}
Linear Element Type: A Carriageway
From Distance: 531 m
To Distance: 575 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.485121 -0.452467
51.484968 -0.452457
51.484725 -0.452466

Segment 3

8 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
Lane Usage: Cl3
Lane Number: 3
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane 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: {DBE42698-869E-4163-9B28-CE4828525A34}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 97 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.482856 -0.45263
51.482282 -0.452707
51.482201 -0.452681
51.482147 -0.452654
51.482101 -0.452626
51.482056 -0.452585
51.482019 -0.452528
51.48201 -0.452514

Geometry type: MultiLineString
Geometry points: 16
First coordinate pair: -0.452466, 51.484725
Road section segments: 1
Road section points: 16

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.452466,
                51.484725
            ],
            [
                -0.452468,
                51.484644
            ],
            [
                -0.452619,
                51.482976
            ],
            [
                -0.45263,
                51.482857
            ],
            [
                -0.45263,
                51.482856
            ],
            [
                -0.452467,
                51.485121
            ],
            [
                -0.452457,
                51.484968
            ],
            [
                -0.452466,
                51.484725
            ],
            [
                -0.45263,
                51.482856
            ],
            [
                -0.452707,
                51.482282
            ],
            [
                -0.452681,
                51.482201
            ],
            [
                -0.452654,
                51.482147
            ],
            [
                -0.452626,
                51.482101
            ],
            [
                -0.452585,
                51.482056
            ],
            [
                -0.452528,
                51.482019
            ],
            [
                -0.452514,
                51.48201
            ]
        ]
    ]
}

View road section coordinates

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