M4 eastbound Jct 20 - lane closure (186/6 to 184/2)
ClearedM4 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
Move Insights
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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
Driving on the M4? See every live closure, roadwork and planned restriction on this road.
M4 live closuresRelated incidents
Contra flow westbound with eastbound closed from Horseshoe Drive
Planned Roadworks National HighwaysExpected to clear in 1 week 46 minutes
contra flow westbound with eastbound closed from Horseshoe Drive
Contra flow westbound with eastbound closed from Horseshoe Drive
Active Roadworks National HighwaysExpected to clear in 2 months 3 weeks
contra flow westbound with eastbound closed from Horseshoe Drive
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 WalesDescription: 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: 12/10/2026 20:00
M4 Eastbound Jct 2 exit slip road closure
Planned Roadworks National HighwaysStarts in 1 hour 46 minutes
M4 Eastbound Jct 2 exit slip road closure
M4 Eastbound Jct 3 to Jct 2 lane 1 closure
Planned Roadworks National HighwaysStarts in 1 hour 46 minutes
M4 Eastbound Jct 3 to Jct 2 lane 1 closure
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A40 eastbound lane 2 closure