M4 eastbound Jct 18 - lane closure (172/3 to 170/0)

Cleared

Start time: Sun, Oct 4, 2026 7:43 PM
Expected end: Mon, Oct 5, 2026 5:00 AM
Duration: 2 hours 57 minutes 1 second
Road: M4 – M4 Eastbound Between J19 And J18
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: 1 of 3 lanes affected, 1 of 2 lanes affected
Reason: Repair Work

Live incident

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Cleared

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First published: Sun, Oct 4, 2026 7:43 PM
Last updated: Sun, Oct 4, 2026 10:17 PM
Cleared: Sun, Oct 4, 2026 10:40 PM

Latest update: M4 eastbound Jct 18 - lane closure (172/3 to 170/0)

Coordinates: 51.499651, -2.371690
Latitude span: 51.498008 – 51.501723
Longitude span: -2.390656 – -2.358474
Bounding box centre: 51.499866, -2.374565
Location descriptions: M4 eastbound between J19 and J18

M4 J18 eastbound exit

Feed validity status: Active
Overall feed start: Sun, Oct 4, 2026 7:43 PM
Overall feed end: Mon, Oct 5, 2026 5:00 AM
Feed window length: 9 hours 17 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

31 coordinate pairs

Description: M4 eastbound between J19 and J18
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: {AE403C52-5D62-47F7-9FDF-592C93083448}
Linear Element Type: B Carriageway
From Distance: 2,797 m
To Distance: 4,868 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.498015 -2.390656
51.498019 -2.39034
51.498014 -2.389332
51.498008 -2.388179
51.498021 -2.387185
51.498026 -2.386739
51.498046 -2.384981
51.498086 -2.383743
51.498231 -2.38056
51.498297 -2.379567
51.498447 -2.37771
51.498459 -2.377599
51.498531 -2.376904
51.498596 -2.376112
51.498616 -2.375939
51.498726 -2.374975
51.498864 -2.373852
51.499141 -2.371737
51.499379 -2.370241
51.499709 -2.368298
51.499901 -2.367248
51.500221 -2.365668
51.500367 -2.364947
51.500422 -2.364645
51.500495 -2.364372
51.500622 -2.363768
51.500896 -2.36256
51.500987 -2.362143
51.501005 -2.362044
51.501097 -2.361553
51.501124 -2.361438

Segment 2

7 coordinate pairs

Description: M4 J18 eastbound exit
Lanes Restricted: 1 lane restricted
Operational Lanes: 2 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: {DEA95468-DA18-4D1C-A7EF-D4998BEAE254}
Linear Element Type: B Carriageway Exit Slip
From Distance: 0 m
To Distance: 217 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.501124 -2.361438
51.501297 -2.360949
51.501406 -2.36046
51.50151 -2.359859
51.501589 -2.359396
51.501708 -2.35859
51.501723 -2.358474

Geometry type: MultiLineString
Geometry points: 38
First coordinate pair: -2.390656, 51.498015
Road section segments: 1
Road section points: 38

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
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            [
                -2.390656,
                51.498015
            ],
            [
                -2.39034,
                51.498019
            ],
            [
                -2.389332,
                51.498014
            ],
            [
                -2.388179,
                51.498008
            ],
            [
                -2.387185,
                51.498021
            ],
            [
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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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            [
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            [
                -2.367248,
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            ],
            [
                -2.365668,
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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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            ],
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            ],
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            ],
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            ],
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            ],
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            ],
            [
                -2.35859,
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            ],
            [
                -2.358474,
                51.501723
            ]
        ]
    ]
}

View road section coordinates

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

Feed provider: National Highways
Data source: Roadworks
Feed version: 2
Record created: Sun, Oct 4, 2026 7:43 PM
Record versioned: Sun, Oct 4, 2026 10:17 PM
Coordinate source: Geometry

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Category: Road Maintenance

View update

A466 : Both directions : M48 J2 Newhouse to A48 Interchange : Resurfacing work : Road closed : Diversions in place : 12/10/26-15/10/26 2000-0600 :

Active Roadworks Traffic Wales

South Gloucestershire

Started Start time TBC

Description: A466 : Both directions : M48 J2 Newhouse to A48 Interchange : Resurfacing work : Road closed : Diversions in place : 12/10/26-15/10/26 2000-0600 :, Start time: 12/10/2026 20:00 , End Date: 15/10/2026 6:00, Severity: Road closure, Source: Welsh Government, Last updated: 09/10/2026 11:57

View update