M4 eastbound Jct 17 exit and entry slip roads lane closures

Planned

Start time: Fri, Aug 21, 2026 7:00 PM
Expected end: Sat, Aug 22, 2026 5:00 AM
Duration: 10 hours
Road: M4 – M4 J17 Eastbound Exit
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: Lane 2 closed, 1 of 2 lanes affected, 1 of 3 lanes affected
Reason: Maintenance Work

Live incident

Active roadworks

Planned

Cleared

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First published: Thu, Aug 20, 2026 6:46 PM
Last updated: Fri, Aug 21, 2026 12:26 AM
Cleared: Sat, Aug 22, 2026 5:00 AM

Latest update: M4 eastbound Jct 17 exit and entry slip roads lane closures

Coordinates: 51.515221, -2.125299
Latitude span: 51.514552 – 51.515774
Longitude span: -2.130030 – -2.122610
Bounding box centre: 51.515163, -2.126320
Location descriptions: M4 J17 eastbound exit

M4 eastbound between J18 and J17

Feed validity status: Planned
Overall feed start: Fri, Aug 21, 2026 7:00 PM
Overall feed end: Sat, Aug 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 J17 eastbound exit
Lane Usage: Cl2
Lane Number: 2
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

Segment 2

2 coordinate pairs

Description: M4 eastbound between J18 and J17
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
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: 214 m
To Distance: 314 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.514552 -2.13003
51.514695 -2.128606

Geometry type: MultiLineString
Geometry points: 11
First coordinate pair: -2.128606, 51.514695
Road section segments: 1
Road section points: 11

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -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
            ],
            [
                -2.13003,
                51.514552
            ],
            [
                -2.128606,
                51.514695
            ]
        ]
    ]
}

View road section coordinates

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