M4 eastbound Jct 18 to 17 - single lane running (166/1 to 161/7)
PlannedM4 eastbound Jct 18 to 17 - single lane running (166/1 to 161/7)
- Start time
- Mon, Aug 17, 2026 7:00 PM
- Expected end
- Tue, Aug 18, 2026 5:00 AM
- Duration
- 10 hours
- Road
- M4 – M4 Eastbound Between J18 And J17
- Category
- Road Maintenance
- Direction
- Eastbound
- Carriageway
- Dual Carriageway
- Lanes affected
- 2 of 2 lanes affected
- Reason
- Maintenance Work
Live incident
Active roadworks
Planned
Cleared
Hover or tap markers for full details
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Flood risk assessment
Planning history
EPC ratings & more
- First published
- Fri, Aug 14, 2026 10:45 PM
- Last updated
- Mon, Aug 17, 2026 8:05 AM
- Cleared
- Tue, Aug 18, 2026 5:00 AM
- Latest update: M4 eastbound Jct 18 to 17 - single lane running (166/1 to 161/7)
- Coordinates
- 51.516009, -2.274132
- Latitude span
- 51.508614 – 51.518951
- Longitude span
- -2.303929 – -2.245264
- Bounding box centre
- 51.513783, -2.274597
- Location descriptions
-
- M4 eastbound between J18 and J17
- Feed validity status
- Planned
- Overall feed start
- Mon, Aug 17, 2026 7:00 PM
- Overall feed end
- Tue, Aug 18, 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
8 coordinate pairs- Description
- M4 eastbound between J18 and J17
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes 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
- {4FB2D3E4-9D88-4F28-A736-D687BA408E9A}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 296 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.518936 -2.263735 51.518911 -2.262955 51.518877 -2.262147 51.51885 -2.261816 51.518807 -2.261311 51.518781 -2.260806 51.518685 -2.259653 51.518665 -2.259487
Segment 2
10 coordinate pairs- Description
- M4 eastbound between J18 and J17
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes 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
- {D4402748-44C2-4997-9A7E-D2D01A23967A}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 1,030 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.518665 -2.259487 51.518632 -2.25922 51.518455 -2.257908 51.518198 -2.256335 51.51794 -2.25495 51.517655 -2.253594 51.517113 -2.250925 51.516232 -2.246381 51.516048 -2.245371 51.516028 -2.245264
Segment 3
30 coordinate pairs- Description
- M4 eastbound between J18 and J17
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes 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
- {8546E8B8-A966-4086-8977-AC3900EB6B05}
- Linear Element Type
- B Carriageway
- From Distance
- 538 m
- To Distance
- 2,912 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.508614 -2.303929 51.508689 -2.303429 51.508954 -2.301845 51.509273 -2.30019 51.509546 -2.298939 51.509719 -2.29819 51.510037 -2.296867 51.510345 -2.295716 51.510726 -2.294335 51.510744 -2.294292 51.511044 -2.293314 51.511714 -2.291301 51.511886 -2.290783 51.51233 -2.28959 51.512638 -2.288727 51.513777 -2.286141 51.514075 -2.285508 51.515214 -2.283123 51.51544 -2.282635 51.515539 -2.282405 51.515883 -2.281585 51.51629 -2.280536 51.516715 -2.279357 51.517096 -2.278091 51.517495 -2.276739 51.517804 -2.275501 51.517867 -2.275213 51.518058 -2.274378 51.518184 -2.273651 51.518186 -2.273644
Segment 4
14 coordinate pairs- Description
- M4 eastbound between J18 and J17
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes 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
- {919B07E5-8FE5-4A7F-9E98-CB529E9E2771}
- Linear Element Type
- B Carriageway
- From Distance
- 0 m
- To Distance
- 695 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.518186 -2.273644 51.518523 -2.271499 51.518605 -2.270995 51.518744 -2.26954 51.51878 -2.269166 51.518855 -2.268099 51.518911 -2.267033 51.518929 -2.266572 51.51893 -2.266529 51.518951 -2.265376 51.518945 -2.26441 51.518944 -2.264266 51.518945 -2.264007 51.518936 -2.263735
- Geometry type
- MultiLineString
- Geometry points
- 62
- First coordinate pair
- -2.263735, 51.518936
- Road section segments
- 1
- Road section points
- 62
View geometry JSON
{
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View road section coordinates
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- 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
- 1
- Record created
- Fri, Aug 14, 2026 10:45 PM
- Record versioned
- Mon, Aug 17, 2026 8:05 AM
- Coordinate source
- Geometry
Driving on the M4? See every live closure, roadwork and planned restriction on this road.
M4 live closuresRelated incidents
M4 eastbound Jct 16 to Jct 15 hardshoulder closure (128/4 to 124/0)
Active Roadworks National Highways
Swindon
M4 · M4 Eastbound Between J16 And J15
Expected to clear in 5 hours 3 minutes
Started 17 Aug 2026, 07:45
Expected clear 17 Aug 2026, 14:00
M4 eastbound Jct 16 to Jct 15 hardshoulder closure (128/4 to 124/0)
Category: Road Maintenance
View update
M48 eastbound Jct 2 to Jct 1 contraflow 198/5-194/7
Planned Roadworks National Highways
South Gloucestershire
M48 · M48 Eastbound Between J2 And J1
Expected to clear in 1 month 1 day
Started 8 Aug 2026, 19:00
Expected clear 18 Sep 2026, 19:00
M48 eastbound Jct 2 to Jct 1 contraflow 198/5-194/7
Category: Road Maintenance
View update
M4 Eastbound Jct 5 to Jct 4B Lane 1 closure
Planned Roadworks National Highways
Slough
M4 · M4 Eastbound Between J5 And J4B
Starts in 12 hours 3 minutes
Starts 17 Aug 2026, 21:00
Expected clear 18 Aug 2026, 04:30
M4 Eastbound Jct 5 to Jct 4B Lane 1 closure
Category: Road Maintenance
View update
M4 southbound Jct 7 lane closure on Huntcombe Spur
Planned Roadworks National Highways
Slough
M4 · Link Road From A4 To M4 J7
Starts in 11 hours 3 minutes
Starts 17 Aug 2026, 20:00
Expected clear 18 Aug 2026, 05:00
M4 southbound Jct 7 lane closure on Huntcombe Spur
Category: Road Maintenance
View update
M4 eastbound Jct 7 entry slip road closure
Planned Roadworks National Highways
Slough
M4 · M4 J7 Eastbound Access
Starts in 11 hours 3 minutes
Starts 17 Aug 2026, 20:00
Expected clear 18 Aug 2026, 05:00
M4 eastbound Jct 7 entry slip road closure
Category: Road Maintenance
View update
M4 eastbound Jct 21 to 20 - lane closures
Planned Roadworks National Highways
South Gloucestershire
M4 · M4 Eastbound Between J21 And J20
Starts in 11 hours 3 minutes
Starts 17 Aug 2026, 20:00
Expected clear 18 Aug 2026, 05:00
M4 eastbound Jct 21 to 20 - lane closures
Category: Road Maintenance
View update