M4 eastbound Jct 18 to Jct 17 lane closure 154/2-152/5

Planned

Start time: Tue, Aug 25, 2026 7:00 PM
Expected end: Wed, Aug 26, 2026 5:00 AM
Duration: 10 hours
Road: M4 – M4 Eastbound Between J18 And J17
Category: Road Maintenance
Direction: Eastbound
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: Tue, Aug 25, 2026 1:55 AM
Last updated: Tue, Aug 25, 2026 3:35 AM
Cleared: Wed, Aug 26, 2026 5:00 AM

Latest update: M4 eastbound Jct 18 to Jct 17 lane closure 154/2-152/5

Coordinates: 51.514734, -2.125755
Latitude span: 51.513466 – 51.515212
Longitude span: -2.138813 – -2.114282
Bounding box centre: 51.514339, -2.126548
Location descriptions: M4 eastbound between J18 and J17

M4 eastbound within J17

Feed validity status: Planned
Overall feed start: Tue, Aug 25, 2026 7:00 PM
Overall feed end: Wed, Aug 26, 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

4 coordinate pairs

Description: M4 eastbound between J18 and J17
Carriageway: Dual Carriageway
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: {5CCF6932-1B08-4416-96F9-5D0D8C678927}
Linear Element Type: B Carriageway
From Distance: 768 m
To Distance: 1,176 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.513466 -2.138813
51.51375 -2.136889
51.514148 -2.133785
51.514231 -2.133072

Segment 2

3 coordinate pairs

Description: M4 eastbound within J17
Carriageway: Dual Carriageway
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: {1A1FB803-12FC-4A7A-A945-379B80D848E9}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 130 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.515052 -2.122641
51.51506 -2.12244
51.515126 -2.120768

Segment 3

4 coordinate pairs

Description: M4 eastbound between J18 and J17
Carriageway: Dual Carriageway
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: {744DCE2C-A1E9-47A3-B07F-536E25300789}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 314 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.514231 -2.133072
51.514416 -2.131357
51.514504 -2.130508
51.514695 -2.128606

Segment 4

5 coordinate pairs

Description: M4 eastbound within J17
Carriageway: Dual Carriageway
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: {6B016953-ACE7-4C07-B60E-C41A74F64E2B}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 415 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.514695 -2.128606
51.514823 -2.126749
51.514887 -2.125588
51.514947 -2.124624
51.515052 -2.122641

Segment 5

6 coordinate pairs

Description: M4 eastbound within J17
Carriageway: Dual Carriageway
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: {03E30372-E28B-4181-BAF9-13906D8D3F22}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 450 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.515126 -2.120768
51.515135 -2.120278
51.515187 -2.117684
51.515205 -2.116759
51.515205 -2.116676
51.515212 -2.114282

Geometry type: MultiLineString
Geometry points: 22
First coordinate pair: -2.138813, 51.513466
Road section segments: 1
Road section points: 22

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -2.138813,
                51.513466
            ],
            [
                -2.136889,
                51.51375
            ],
            [
                -2.133785,
                51.514148
            ],
            [
                -2.133072,
                51.514231
            ],
            [
                -2.122641,
                51.515052
            ],
            [
                -2.12244,
                51.51506
            ],
            [
                -2.120768,
                51.515126
            ],
            [
                -2.133072,
                51.514231
            ],
            [
                -2.131357,
                51.514416
            ],
            [
                -2.130508,
                51.514504
            ],
            [
                -2.128606,
                51.514695
            ],
            [
                -2.128606,
                51.514695
            ],
            [
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            ],
            [
                -2.125588,
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            ],
            [
                -2.124624,
                51.514947
            ],
            [
                -2.122641,
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            ],
            [
                -2.120768,
                51.515126
            ],
            [
                -2.120278,
                51.515135
            ],
            [
                -2.117684,
                51.515187
            ],
            [
                -2.116759,
                51.515205
            ],
            [
                -2.116676,
                51.515205
            ],
            [
                -2.114282,
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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