M4 Northbound Jct 4A to Jct 4 lane 1 closure

Cleared

Start time: Wed, Jul 29, 2026 9:00 PM
Expected end: Thu, Jul 30, 2026 4:30 AM
Duration: 1 second
Road: M4 – M4 Spur (Heathrow) Southbound Between M4 And J4A
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Lanes affected: 1 of 2 lanes affected, 1 of 3 lanes affected, 1 of 1 lanes affected
Reason: Repair Work

Live incident

Active roadworks

Planned

Cleared

Hover or tap markers for full details

Move Insights

Thinking of moving to this area?

Check flood risk, planning history, EPC ratings and more with a Move Insights property report.

Flood risk assessment

Planning history

EPC ratings & more

Get a property report

First published: Wed, Jul 15, 2026 8:50 AM
Last updated: Wed, Jul 29, 2026 8:54 AM
Cleared: Wed, Jul 29, 2026 9:00 PM

Latest update: M4 Northbound Jct 4A to Jct 4 lane 1 closure

Coordinates: 51.488969, -0.453370
Latitude span: 51.482326 – 51.494621
Longitude span: -0.453925 – -0.452713
Bounding box centre: 51.488474, -0.453319
Location descriptions: M4 spur (Heathrow) southbound between M4 and J4A

tM4 fast slip from M4 spur (Heathrow) northbound to M4 J4 westbound access

Feed validity status: Planned
Overall feed start: Wed, Jul 29, 2026 9:00 PM
Overall feed end: Thu, Jul 30, 2026 4:30 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 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
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: {0EB04764-4287-4D40-8593-2DA19D575B07}
Linear Element Type: B Carriageway
From Distance: 42 m
To Distance: 102 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.482326 -0.452919
51.482866 -0.452874

Segment 2

2 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
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: {97A079A4-D539-4C77-BA82-1A9E09163D0B}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 219 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.482866 -0.452874
51.484836 -0.452721

Segment 3

14 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
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: {0C37367B-0F7F-4670-899D-6C162710DACF}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 562 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.484836 -0.452721
51.48507 -0.452713
51.48534 -0.452732
51.485754 -0.452762
51.486051 -0.452795
51.48624 -0.452818
51.486439 -0.452868
51.48698 -0.452994
51.487341 -0.453097
51.488091 -0.45336
51.488832 -0.453594
51.488859 -0.453607
51.489517 -0.453772
51.489833 -0.453834

Segment 4

10 coordinate pairs

Description: M4 spur (Heathrow) southbound between M4 and J4A
Carriageway: Dual Carriageway
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: {BB41FD99-93C9-4650-80B5-8CBA01C969EE}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 507 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.489833 -0.453834
51.489995 -0.453857
51.490508 -0.453897
51.490967 -0.453925
51.491381 -0.453911
51.491399 -0.45391
51.491794 -0.453868
51.492997 -0.45375
51.493635 -0.45368
51.494383 -0.453599

Segment 5

4 coordinate pairs

Description: tM4 fast slip from M4 spur (Heathrow) northbound to M4 J4 westbound access
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: West Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: M4
Linear Element Model: The Network Model
Linear Element Id: {E703747E-E6AD-46A9-A362-5B1944175B68}
Linear Element Type: A Carriageway Entry Slip
From Distance: 0 m
To Distance: 26 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.494383 -0.453599
51.494446 -0.453611
51.49458 -0.453658
51.494621 -0.45367

Geometry type: MultiLineString
Geometry points: 32
First coordinate pair: -0.452919, 51.482326
Road section segments: 1
Road section points: 32

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.452919,
                51.482326
            ],
            [
                -0.452874,
                51.482866
            ],
            [
                -0.452874,
                51.482866
            ],
            [
                -0.452721,
                51.484836
            ],
            [
                -0.452721,
                51.484836
            ],
            [
                -0.452713,
                51.48507
            ],
            [
                -0.452732,
                51.48534
            ],
            [
                -0.452762,
                51.485754
            ],
            [
                -0.452795,
                51.486051
            ],
            [
                -0.452818,
                51.48624
            ],
            [
                -0.452868,
                51.486439
            ],
            [
                -0.452994,
                51.48698
            ],
            [
                -0.453097,
                51.487341
            ],
            [
                -0.45336,
                51.488091
            ],
            [
                -0.453594,
                51.488832
            ],
            [
                -0.453607,
                51.488859
            ],
            [
                -0.453772,
                51.489517
            ],
            [
                -0.453834,
                51.489833
            ],
            [
                -0.453834,
                51.489833
            ],
            [
                -0.453857,
                51.489995
            ],
            [
                -0.453897,
                51.490508
            ],
            [
                -0.453925,
                51.490967
            ],
            [
                -0.453911,
                51.491381
            ],
            [
                -0.45391,
                51.491399
            ],
            [
                -0.453868,
                51.491794
            ],
            [
                -0.45375,
                51.492997
            ],
            [
                -0.45368,
                51.493635
            ],
            [
                -0.453599,
                51.494383
            ],
            [
                -0.453599,
                51.494383
            ],
            [
                -0.453611,
                51.494446
            ],
            [
                -0.453658,
                51.49458
            ],
            [
                -0.45367,
                51.494621
            ]
        ]
    ]
}

View road section coordinates

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