M4 eastbound lane 1 closure (110/3 to 109/1)

Cleared

Start time: Wed, Jul 29, 2026 7:00 PM
Expected end: Thu, Jul 30, 2026 5:00 AM
Duration: 1 second
Road: M4 – M4 Eastbound Between J15 And J14
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: Lane 1 closed, 1 of 3 lanes affected
Reason: Maintenance Work

Live incident

Active roadworks

Planned

Cleared

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First published: Fri, Jun 5, 2026 10:19 AM
Last updated: Wed, Jul 29, 2026 10:32 AM
Cleared: Wed, Jul 29, 2026 7:00 PM

Latest update: M4 eastbound lane 1 closure (110/3 to 109/1)

Coordinates: 51.479345, -1.550809
Latitude span: 51.476473 – 51.483027
Longitude span: -1.558717 – -1.544569
Bounding box centre: 51.479750, -1.551643
Location descriptions: M4 eastbound between J15 and J14

M4 eastbound at the Membury services between J15 and J14

Feed validity status: Planned
Overall feed start: Wed, Jul 29, 2026 7:00 PM
Overall feed end: Thu, Jul 30, 2026 5:00 AM
Feed window length: 10 hours
Probability code (raw): probable
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

9 coordinate pairs

Description: M4 eastbound between J15 and J14
Carriageway: Dual Carriageway
Lane Usage: Cl1
Lane Number: 1
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 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: {BDCE1422-0001-46D3-8912-7CB90850BEA4}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 566 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.479482 -1.551136
51.478728 -1.549737
51.47861 -1.549508
51.477676 -1.547443
51.477585 -1.547228
51.477114 -1.546139
51.476841 -1.545465
51.476569 -1.544819
51.476473 -1.544569

Segment 2

6 coordinate pairs

Description: M4 eastbound at the Membury services between J15 and J14
Carriageway: Dual Carriageway
Lane Usage: Cl1
Lane Number: 1
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 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: {057B632F-3353-4EDB-B9AA-8236EB19BC4E}
Linear Element Type: B Carriageway
From Distance: 361 m
To Distance: 937 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.483027 -1.558717
51.482667 -1.557797
51.482134 -1.556535
51.481485 -1.555124
51.481093 -1.55431
51.479951 -1.552044

Segment 3

2 coordinate pairs

Description: M4 eastbound between J15 and J14
Carriageway: Dual Carriageway
Lane Usage: Cl1
Lane Number: 1
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 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: {CE4B5B26-C0C8-4914-8E16-FACE5275DE1D}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 81 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.479951 -1.552044
51.479482 -1.551136

Geometry type: MultiLineString
Geometry points: 17
First coordinate pair: -1.551136, 51.479482
Road section segments: 1
Road section points: 17

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -1.551136,
                51.479482
            ],
            [
                -1.549737,
                51.478728
            ],
            [
                -1.549508,
                51.47861
            ],
            [
                -1.547443,
                51.477676
            ],
            [
                -1.547228,
                51.477585
            ],
            [
                -1.546139,
                51.477114
            ],
            [
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                51.476841
            ],
            [
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            ],
            [
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            ],
            [
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            [
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            ],
            [
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            ],
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            ],
            [
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            ]
        ]
    ]
}

View road section coordinates

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