M4 westbound Membury Services entry slip road closure

Cleared

Start time: Tue, May 26, 2026 8:03 PM
Expected end: Wed, May 27, 2026 5:00 AM
Duration: 8 hours 57 minutes
Road: M4 – M4 Westbound At The Membury Services Slip Road Between J14 And J15
Category: Road Maintenance
Direction: Westbound
Carriageway: Dual Carriageway
Reason: Maintenance Work

Live incident

Active roadworks

Planned

Cleared

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First published: Tue, May 26, 2026 8:03 PM
Last updated: Wed, May 27, 2026 12:33 AM
Cleared: Wed, May 27, 2026 5:00 AM

Latest update: M4 westbound Membury Services entry slip road closure

Coordinates: 51.484356, -1.563252
Latitude span: 51.483483 – 51.485075
Longitude span: -1.565544 – -1.560839
Bounding box centre: 51.484279, -1.563192
Location descriptions: M4 westbound at the Membury services slip road between J14 and J15

M4 westbound between J14 and J15

Feed validity status: Active
Overall feed start: Tue, May 26, 2026 8:03 PM
Overall feed end: Wed, May 27, 2026 5:00 AM
Feed window length: 8 hours 57 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 westbound at the Membury services slip road between J14 and J15
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: {4036C71A-BAEA-4258-B3CE-2B9C702D43DC}
Linear Element Type: A Carriageway Entry Slip
From Distance: 47 m
To Distance: 257 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.483483 -1.560839
51.483572 -1.561036
51.484468 -1.563431

Segment 2

4 coordinate pairs

Description: M4 westbound between J14 and J15
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: {9E0660BF-BFD3-4635-A85B-A98AB37B0BAA}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 161 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.484468 -1.563431
51.484638 -1.563983
51.484787 -1.564498
51.485075 -1.565544

Geometry type: MultiLineString
Geometry points: 7
First coordinate pair: -1.560839, 51.483483
Road section segments: 1
Road section points: 7

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -1.560839,
                51.483483
            ],
            [
                -1.561036,
                51.483572
            ],
            [
                -1.563431,
                51.484468
            ],
            [
                -1.563431,
                51.484468
            ],
            [
                -1.563983,
                51.484638
            ],
            [
                -1.564498,
                51.484787
            ],
            [
                -1.565544,
                51.485075
            ]
        ]
    ]
}

View road section coordinates

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