M4 both directions Jct 16 to Jct 17 - lane 3 closure

Active

Start time: Wed, Oct 21, 2026 7:53 PM
Expected end: Thu, Oct 22, 2026 5:00 AM
Duration: 9 hours 7 minutes
Road: M4 – M4 Eastbound Between J17 And J16
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: Lane 3 closed, 1 of 3 lanes affected
Reason: Repair Work

Live incident

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First published: Wed, Oct 21, 2026 7:53 PM
Last updated: Wed, Oct 21, 2026 9:20 PM
Cleared: Thu, Oct 22, 2026 5:00 AM

Latest update: M4 both directions Jct 16 to Jct 17 - lane 3 closure

Coordinates: 51.544210, -1.974157
Latitude span: 51.542450 – 51.545656
Longitude span: -1.978999 – -1.969217
Bounding box centre: 51.544053, -1.974108
Location descriptions: M4 eastbound between J17 and J16

Feed validity status: Active
Overall feed start: Wed, Oct 21, 2026 7:53 PM
Overall feed end: Thu, Oct 22, 2026 5:00 AM
Feed window length: 9 hours 7 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

9 coordinate pairs

Description: M4 eastbound between J17 and J16
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: East Bound
Direction Relative: Aligned
Height Grade: Start1 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {DDBC8956-7B5B-4E2E-B676-464FA35443D8}
Linear Element Type: B Carriageway
From Distance: 587 m
To Distance: 954 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.54245 -1.978999
51.542593 -1.978675
51.54297 -1.977767
51.543375 -1.976743
51.543598 -1.976151
51.543842 -1.975502
51.544004 -1.975041
51.544181 -1.974498
51.544182 -1.974496

Segment 2

9 coordinate pairs

Description: M4 eastbound between J17 and J16
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: East Bound
Direction Relative: Aligned
Height Grade: Start2 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {5CD975B7-7328-47EF-BF84-9C1174C6F5C6}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 401 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.544182 -1.974496
51.544488 -1.973555
51.544624 -1.973137
51.544795 -1.972546
51.544903 -1.972142
51.545046 -1.971651
51.545271 -1.970815
51.545621 -1.969387
51.545656 -1.969217

Geometry type: MultiLineString
Geometry points: 18
First coordinate pair: -1.978999, 51.542450
Road section segments: 1
Road section points: 18

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -1.978999,
                51.54245
            ],
            [
                -1.978675,
                51.542593
            ],
            [
                -1.977767,
                51.54297
            ],
            [
                -1.976743,
                51.543375
            ],
            [
                -1.976151,
                51.543598
            ],
            [
                -1.975502,
                51.543842
            ],
            [
                -1.975041,
                51.544004
            ],
            [
                -1.974498,
                51.544181
            ],
            [
                -1.974496,
                51.544182
            ],
            [
                -1.974496,
                51.544182
            ],
            [
                -1.973555,
                51.544488
            ],
            [
                -1.973137,
                51.544624
            ],
            [
                -1.972546,
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            ],
            [
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            ],
            [
                -1.971651,
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            ],
            [
                -1.970815,
                51.545271
            ],
            [
                -1.969387,
                51.545621
            ],
            [
                -1.969217,
                51.545656
            ]
        ]
    ]
}

View road section coordinates

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