Crash View

M4 eastbound Jct 20 - lane closure (186/6 to 184/2)

Cleared

M4 eastbound Jct 20 - lane closure (186/6 to 184/2)

Start time
Sun, Oct 11, 2026 8:00 PM
Expected end
Mon, Oct 12, 2026 5:00 AM
Duration
8 hours 50 minutes 1 second
Road
M4 – M4 Eastbound Between J20 And J19
Category
Road Maintenance
Direction
Eastbound
Carriageway
Dual Carriageway
Lanes affected
Lane 2 closed, 1 of 3 lanes affected, 1 of 2 lanes affected
Reason
Maintenance Work
Live incident
Active roadworks
Planned
Cleared
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First published
Mon, Oct 12, 2026 4:18 AM
Last updated
Mon, Oct 12, 2026 4:30 AM
Cleared
Mon, Oct 12, 2026 4:50 AM
  • Latest update: M4 eastbound Jct 20 - lane closure (186/6 to 184/2)
Coordinates
51.541444, -2.543222
Latitude span
51.531960 – 51.550468
Longitude span
-2.551537 – -2.533774
Bounding box centre
51.541214, -2.542656
Location descriptions
  • M4 eastbound between J20 and J19
  • M4 eastbound within J20
Feed validity status
Planned
Overall feed start
Sun, Oct 11, 2026 8:00 PM
Overall feed end
Mon, Oct 12, 2026 5:00 AM
Feed window length
9 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

7 coordinate pairs
Description
M4 eastbound between J20 and J19
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
Start1 End1
Linear Element Road
M4
Linear Element Model
The Network Model
Linear Element Id
{581B4D6A-665F-46CA-9F01-6FC3F1B84523}
Linear Element Type
B Carriageway
From Distance
0 m
To Distance
423 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.54681 -2.548347
51.545247 -2.546996
51.545229 -2.54698
51.54479 -2.5466
51.54462 -2.546468
51.54393 -2.545854
51.543474 -2.545416

Segment 2

5 coordinate pairs
Description
M4 eastbound within J20
Carriageway
Dual Carriageway
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
Start2 End1
Linear Element Road
M4
Linear Element Model
The Network Model
Linear Element Id
{D47D9956-3E4B-4BFB-80C9-801B183CA129}
Linear Element Type
B Carriageway
From Distance
100 m
To Distance
563 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.550468 -2.551537
51.549482 -2.550737
51.549125 -2.55043
51.547933 -2.549406
51.54681 -2.548347

Segment 3

12 coordinate pairs
Description
M4 eastbound between J20 and J19
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
Start1 End1
Linear Element Road
M4
Linear Element Model
The Network Model
Linear Element Id
{85AC09F6-96DE-494F-B2A9-C8AA2E3DFACC}
Linear Element Type
B Carriageway
From Distance
0 m
To Distance
1,514 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
51.543474 -2.545416
51.541656 -2.543707
51.540672 -2.542787
51.538649 -2.540758
51.53702 -2.539095
51.535669 -2.537652
51.535043 -2.536997
51.534219 -2.536135
51.533432 -2.535301
51.532966 -2.534809
51.531974 -2.533788
51.53196 -2.533774
Geometry type
MultiLineString
Geometry points
24
First coordinate pair
-2.548347, 51.546810
Road section segments
1
Road section points
24
View geometry JSON 
{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -2.548347,
                51.54681
            ],
            [
                -2.546996,
                51.545247
            ],
            [
                -2.54698,
                51.545229
            ],
            [
                -2.5466,
                51.54479
            ],
            [
                -2.546468,
                51.54462
            ],
            [
                -2.545854,
                51.54393
            ],
            [
                -2.545416,
                51.543474
            ],
            [
                -2.551537,
                51.550468
            ],
            [
                -2.550737,
                51.549482
            ],
            [
                -2.55043,
                51.549125
            ],
            [
                -2.549406,
                51.547933
            ],
            [
                -2.548347,
                51.54681
            ],
            [
                -2.545416,
                51.543474
            ],
            [
                -2.543707,
                51.541656
            ],
            [
                -2.542787,
                51.540672
            ],
            [
                -2.540758,
                51.538649
            ],
            [
                -2.539095,
                51.53702
            ],
            [
                -2.537652,
                51.535669
            ],
            [
                -2.536997,
                51.535043
            ],
            [
                -2.536135,
                51.534219
            ],
            [
                -2.535301,
                51.533432
            ],
            [
                -2.534809,
                51.532966
            ],
            [
                -2.533788,
                51.531974
            ],
            [
                -2.533774,
                51.53196
            ]
        ]
    ]
}
View road section coordinates 
[
    [
        [
            -2.548347,
            51.54681
        ],
        [
            -2.546996,
            51.545247
        ],
        [
            -2.54698,
            51.545229
        ],
        [
            -2.5466,
            51.54479
        ],
        [
            -2.546468,
            51.54462
        ],
        [
            -2.545854,
            51.54393
        ],
        [
            -2.545416,
            51.543474
        ],
        [
            -2.551537,
            51.550468
        ],
        [
            -2.550737,
            51.549482
        ],
        [
            -2.55043,
            51.549125
        ],
        [
            -2.549406,
            51.547933
        ],
        [
            -2.548347,
            51.54681
        ],
        [
            -2.545416,
            51.543474
        ],
        [
            -2.543707,
            51.541656
        ],
        [
            -2.542787,
            51.540672
        ],
        [
            -2.540758,
            51.538649
        ],
        [
            -2.539095,
            51.53702
        ],
        [
            -2.537652,
            51.535669
        ],
        [
            -2.536997,
            51.535043
        ],
        [
            -2.536135,
            51.534219
        ],
        [
            -2.535301,
            51.533432
        ],
        [
            -2.534809,
            51.532966
        ],
        [
            -2.533788,
            51.531974
        ],
        [
            -2.533774,
            51.53196
        ]
    ]
]
Cause type
Road Maintenance
Detailed cause
Maintenance Work
Compliance
Mandatory
Probability
Probable
Validity status
Planned
Road management
Other
Feed provider
National Highways
Data source
Roadworks
Feed version
2
Record created
Mon, Oct 12, 2026 4:18 AM
Record versioned
Mon, Oct 12, 2026 4:30 AM
Coordinate source
Geometry

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