M4 westbound Jct 16 to Jct 17 lane closure 140/0-140/7

Cleared

Start time: Tue, Jul 21, 2026 7:00 PM
Expected end: Wed, Jul 22, 2026 5:00 AM
Duration: 1 hour 30 minutes 1 second
Road: M4 – M4 Westbound Between J16 And J17
Category: Road Maintenance
Direction: Westbound
Carriageway: Dual Carriageway
Lanes affected: 1 of 3 lanes affected
Reason: Maintenance Work

Live incident

Active roadworks

Planned

Cleared

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First published: Thu, Jul 9, 2026 2:26 PM
Last updated: Tue, Jul 21, 2026 8:05 PM
Cleared: Tue, Jul 21, 2026 8:30 PM

Latest update: M4 westbound Jct 16 to Jct 17 lane closure 140/0-140/7

Coordinates: 51.547279, -1.952545
Latitude span: 51.547160 – 51.547543
Longitude span: -1.956491 – -1.946465
Bounding box centre: 51.547352, -1.951478
Location descriptions: M4 westbound between J16 and J17

Feed validity status: Planned
Overall feed start: Tue, Jul 21, 2026 7:00 PM
Overall feed end: Wed, Jul 22, 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 westbound between J16 and J17
Carriageway: Dual Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 operational lanes
Direction On Section: West Bound
Direction Relative: Aligned
Height Grade: Start2 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {DC3F22EB-CA45-490B-99AB-632B3EDDEF07}
Linear Element Type: A Carriageway
From Distance: 544 m
To Distance: 1,196 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.547543 -1.946465
51.547499 -1.947018
51.547439 -1.947783
51.547314 -1.949931
51.547278 -1.950912
51.547243 -1.951936
51.547224 -1.953941
51.547217 -1.954647
51.547182 -1.955846

Segment 2

4 coordinate pairs

Description: M4 westbound between J16 and J17
Carriageway: Dual Carriageway
Lanes Restricted: 1 lane restricted
Operational Lanes: 3 operational lanes
Direction On Section: West Bound
Direction Relative: Aligned
Height Grade: Start2 End2
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {63E41670-8B95-4DBF-9C3A-6E364B337E8C}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 44 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.547182 -1.955846
51.547182 -1.955849
51.547164 -1.956421
51.54716 -1.956491

Geometry type: MultiLineString
Geometry points: 13
First coordinate pair: -1.946465, 51.547543
Road section segments: 1
Road section points: 13

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -1.946465,
                51.547543
            ],
            [
                -1.947018,
                51.547499
            ],
            [
                -1.947783,
                51.547439
            ],
            [
                -1.949931,
                51.547314
            ],
            [
                -1.950912,
                51.547278
            ],
            [
                -1.951936,
                51.547243
            ],
            [
                -1.953941,
                51.547224
            ],
            [
                -1.954647,
                51.547217
            ],
            [
                -1.955846,
                51.547182
            ],
            [
                -1.955846,
                51.547182
            ],
            [
                -1.955849,
                51.547182
            ],
            [
                -1.956421,
                51.547164
            ],
            [
                -1.956491,
                51.54716
            ]
        ]
    ]
}

View road section coordinates

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