M4 Eastbound Jct 4b to M25 Clockwise Jct 15 lane closure

Planned

Start time: Mon, Mar 23, 2026 10:00 PM
Expected end: Tue, Mar 24, 2026 5:30 AM
Duration: 7 hours 30 minutes
Road: M4 – M4 Eastbound Between J5 And J4B
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: Lane 2 closed, 1 of 4 lanes affected, 1 of 2 lanes affected
Reason: Roadworks

Active

Planned

Cleared

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First published: Wed, Feb 4, 2026 11:39 AM
Last updated: Mon, Mar 23, 2026 10:01 PM
Cleared: Tue, Mar 24, 2026 5:30 AM

Latest update: M4 Eastbound Jct 4b to M25 Clockwise Jct 15 lane closure

Coordinates: 51.493796, -0.516002
Latitude span: 51.493119 – 51.495699
Longitude span: -0.533236 – -0.499517
Bounding box centre: 51.494409, -0.516377
Location descriptions: M4 eastbound between J5 and J4B

link road from M4 J4B eastbound to M25 J15

Feed validity status: Planned
Overall feed start: Mon, Mar 23, 2026 10:00 PM
Overall feed end: Tue, Mar 24, 2026 5:30 AM
Feed window length: 7 hours 30 minutes
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

2 coordinate pairs

Description: M4 eastbound between J5 and J4B
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 4 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: {8266070A-9116-4A3E-B544-1AAE10E774C0}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 15 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.494178 -0.505994
51.494215 -0.505777

Segment 2

24 coordinate pairs

Description: M4 eastbound between J5 and J4B
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 4 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: {E240EF51-44E3-47A6-AAA7-217FB89D1F13}
Linear Element Type: B Carriageway
From Distance: 229 m
To Distance: 1,870 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.493328 -0.529454
51.493336 -0.529027
51.493332 -0.527947
51.493309 -0.526881
51.493293 -0.526277
51.493276 -0.524923
51.493173 -0.520389
51.493122 -0.517726
51.49312 -0.516717
51.493119 -0.51604
51.49312 -0.515421
51.493171 -0.514123
51.493174 -0.514036
51.493233 -0.513026
51.493328 -0.511957
51.493343 -0.511783
51.493456 -0.510757
51.493557 -0.510037
51.493572 -0.509932
51.493679 -0.509208
51.493713 -0.509008
51.493972 -0.507441
51.494091 -0.506602
51.494178 -0.505994

Segment 3

5 coordinate pairs

Description: M4 eastbound between J5 and J4B
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: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {2D7FBEAA-7E69-47DC-8335-F678E9006D5D}
Linear Element Type: B Carriageway
From Distance: 3 m
To Distance: 37 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.493179 -0.533236
51.493182 -0.53319
51.493186 -0.533137
51.493198 -0.532962
51.493212 -0.532747

Segment 4

8 coordinate pairs

Description: M4 eastbound between J5 and J4B
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 4 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: {E240EF51-44E3-47A6-AAA7-217FB89D1F13}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 230 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.493212 -0.532747
51.493249 -0.532127
51.493264 -0.531853
51.493277 -0.531492
51.493297 -0.530915
51.493315 -0.530194
51.493328 -0.529476
51.493329 -0.529432

Segment 5

10 coordinate pairs

Description: link road from M4 J4B eastbound to M25 J15
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: {F8ED4782-79F0-478D-801B-C850EBB05D33}
Linear Element Type: A Carriageway Entry Slip
From Distance: 0 m
To Distance: 373 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.494215 -0.505777
51.494656 -0.50327
51.494672 -0.503173
51.494787 -0.502477
51.494917 -0.501713
51.49494 -0.50159
51.494993 -0.50131
51.495054 -0.501031
51.495164 -0.500675
51.49518 -0.500639

Segment 6

3 coordinate pairs

Description: link road from M4 J4B eastbound to M25 J15
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: {21298787-4F37-429A-9C6E-F407918FDCAF}
Linear Element Type: A Carriageway Entry Slip
From Distance: 0 m
To Distance: 96 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.49518 -0.500639
51.495322 -0.500313
51.495699 -0.499517

Geometry type: MultiLineString
Geometry points: 52
First coordinate pair: -0.505994, 51.494178
Road section segments: 1
Road section points: 52

View geometry JSON

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}

View road section coordinates

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