M4 Eastbound Jct 4 Carriageway closure between the exit and entry slip road

Planned

Start time: Mon, Jun 15, 2026 9:00 PM
Expected end: Tue, Jun 16, 2026 4:30 AM
Duration: 7 hours 30 minutes
Road: M4 – M4 Eastbound Between J4 And J3
Category: Construction Work
Direction: Eastbound
Carriageway: Dual Carriageway
Reason: Construction Work

Live incident

Active roadworks

Planned

Cleared

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First published: Thu, Apr 30, 2026 9:20 AM
Last updated: Sun, Jun 14, 2026 11:59 PM
Cleared: Tue, Jun 16, 2026 4:30 AM

Latest update: M4 Eastbound Jct 4 Carriageway closure between the exit and entry slip road

Coordinates: 51.495389, -0.449239
Latitude span: 51.494307 – 51.495924
Longitude span: -0.459807 – -0.436835
Bounding box centre: 51.495116, -0.448321
Location descriptions: M4 eastbound between J4 and J3

M4 eastbound within J4

Feed validity status: Planned
Overall feed start: Mon, Jun 15, 2026 9:00 PM
Overall feed end: Tue, Jun 16, 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

9 coordinate pairs

Description: M4 eastbound between J4 and J3
Carriageway: Dual Carriageway
Lanes Restricted: 4 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: {033C1081-1437-46E3-AA87-D2149446F0ED}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 624 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.495175 -0.445715
51.495133 -0.44527
51.495065 -0.444624
51.494999 -0.444007
51.494887 -0.442974
51.494796 -0.44204
51.494588 -0.439887
51.494449 -0.438451
51.494307 -0.436835

Segment 2

3 coordinate pairs

Description: M4 eastbound within J4
Carriageway: Dual Carriageway
Lanes Restricted: 4 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {4442FA0A-EC3E-41C4-90D6-3ED4A57FAA16}
Linear Element Type: B Carriageway
From Distance: 33 m
To Distance: 223 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.495924 -0.459807
51.495913 -0.457754
51.495909 -0.457071

Segment 3

5 coordinate pairs

Description: M4 eastbound within J4
Carriageway: Dual Carriageway
Lanes Restricted: 4 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start2 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {8B9F1582-CB0B-49DE-A17C-FBF233A8C67F}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 471 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.49574 -0.452438
51.495673 -0.451389
51.495486 -0.448831
51.495308 -0.44695
51.495175 -0.445715

Segment 4

4 coordinate pairs

Description: M4 eastbound within J4
Carriageway: Dual Carriageway
Lanes Restricted: 4 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start2 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {8AFC74F1-DA9E-4B94-A92D-C6874C5AAB05}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 200 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.495909 -0.457071
51.495892 -0.456423
51.495853 -0.454869
51.495821 -0.454186

Segment 5

3 coordinate pairs

Description: M4 eastbound within J4
Carriageway: Dual Carriageway
Lanes Restricted: 4 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start2 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {BB949862-DA9E-4A53-AD0C-C36997F3AFC5}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 121 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.495821 -0.454186
51.495763 -0.452812
51.49574 -0.452438

Geometry type: MultiLineString
Geometry points: 24
First coordinate pair: -0.445715, 51.495175
Road section segments: 1
Road section points: 24

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.445715,
                51.495175
            ],
            [
                -0.44527,
                51.495133
            ],
            [
                -0.444624,
                51.495065
            ],
            [
                -0.444007,
                51.494999
            ],
            [
                -0.442974,
                51.494887
            ],
            [
                -0.44204,
                51.494796
            ],
            [
                -0.439887,
                51.494588
            ],
            [
                -0.438451,
                51.494449
            ],
            [
                -0.436835,
                51.494307
            ],
            [
                -0.459807,
                51.495924
            ],
            [
                -0.457754,
                51.495913
            ],
            [
                -0.457071,
                51.495909
            ],
            [
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            ],
            [
                -0.451389,
                51.495673
            ],
            [
                -0.448831,
                51.495486
            ],
            [
                -0.44695,
                51.495308
            ],
            [
                -0.445715,
                51.495175
            ],
            [
                -0.457071,
                51.495909
            ],
            [
                -0.456423,
                51.495892
            ],
            [
                -0.454869,
                51.495853
            ],
            [
                -0.454186,
                51.495821
            ],
            [
                -0.454186,
                51.495821
            ],
            [
                -0.452812,
                51.495763
            ],
            [
                -0.452438,
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            ]
        ]
    ]
}

View road section coordinates

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