M4 eastbound lane 1 closure, including on Jct 17 exit slip road

Cleared

Start time: Fri, Sep 18, 2026 7:00 PM
Expected end: Sat, Sep 19, 2026 5:00 AM
Duration: 10 hours
Road: M4 – M4 Eastbound Between J18 And J17
Category: Authority Operation
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: Lane 1 closed, 1 of 3 lanes affected, 1 of 2 lanes affected
Reason: Other

Live incident

Active roadworks

Planned

Cleared

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First published: Fri, Sep 4, 2026 9:13 PM
Last updated: Sat, Sep 19, 2026 4:51 AM
Cleared: Sat, Sep 19, 2026 5:00 AM

Latest update: M4 eastbound lane 1 closure, including on Jct 17 exit slip road

Coordinates: 51.514802, -2.128573
Latitude span: 51.513469 – 51.515774
Longitude span: -2.138791 – -2.122610
Bounding box centre: 51.514622, -2.130701
Location descriptions: M4 eastbound between J18 and J17

M4 J17 eastbound exit

Feed validity status: Planned
Overall feed start: Fri, Sep 18, 2026 7:00 PM
Overall feed end: Sat, Sep 19, 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
Lane Usage: Cl1
Lane Number: 1
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: {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 2

4 coordinate pairs

Description: M4 eastbound between J18 and J17
Carriageway: Dual Carriageway
Lane Usage: Cl1
Lane Number: 1
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: {5CCF6932-1B08-4416-96F9-5D0D8C678927}
Linear Element Type: B Carriageway
From Distance: 770 m
To Distance: 1,176 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.513469 -2.138791
51.51375 -2.136889
51.514148 -2.133785
51.514231 -2.133072

Segment 3

9 coordinate pairs

Description: M4 J17 eastbound exit
Lane Usage: Cl1
Lane Number: 1
Lane Status: Closed
Lane Direction: Aligned
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: {B82C55B4-89E6-454D-9289-52D5FCC1017E}
Linear Element Type: B Carriageway Exit Slip
From Distance: 0 m
To Distance: 436 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.514695 -2.128606
51.514945 -2.126892
51.515183 -2.125248
51.515393 -2.123981
51.515506 -2.123251
51.515535 -2.123103
51.515559 -2.123024
51.515594 -2.122941
51.515774 -2.12261

Geometry type: MultiLineString
Geometry points: 17
First coordinate pair: -2.133072, 51.514231
Road section segments: 1
Road section points: 17

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -2.133072,
                51.514231
            ],
            [
                -2.131357,
                51.514416
            ],
            [
                -2.130508,
                51.514504
            ],
            [
                -2.128606,
                51.514695
            ],
            [
                -2.138791,
                51.513469
            ],
            [
                -2.136889,
                51.51375
            ],
            [
                -2.133785,
                51.514148
            ],
            [
                -2.133072,
                51.514231
            ],
            [
                -2.128606,
                51.514695
            ],
            [
                -2.126892,
                51.514945
            ],
            [
                -2.125248,
                51.515183
            ],
            [
                -2.123981,
                51.515393
            ],
            [
                -2.123251,
                51.515506
            ],
            [
                -2.123103,
                51.515535
            ],
            [
                -2.123024,
                51.515559
            ],
            [
                -2.122941,
                51.515594
            ],
            [
                -2.12261,
                51.515774
            ]
        ]
    ]
}

View road section coordinates

Cause type: Authority Operation
Detailed cause: Other
Compliance: Mandatory
Probability: Probable
Validity status: Planned
Road management: Other