A421 eastbound Marston Moretaine to Marsh leys carriageway closure

Cleared

Start time: Mon, Mar 2, 2026 8:00 PM
Expected end: Tue, Mar 3, 2026 5:00 AM
Duration: 9 hours
Road: A421 – A421 Northbound Between M1 And A428
Category: Road Maintenance
Direction: Eastbound
Carriageway: Dual Carriageway
Reason: Maintenance Work

Live incident

Active roadworks

Planned

Cleared

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First published: Thu, Feb 5, 2026 8:54 AM
Last updated: Mon, Mar 2, 2026 7:00 PM
Cleared: Tue, Mar 3, 2026 5:00 AM

Latest update: A421 eastbound Marston Moretaine to Marsh leys carriageway closure

Coordinates: 52.071592, -0.544487
Latitude span: 52.066964 – 52.080470
Longitude span: -0.554190 – -0.529390
Bounding box centre: 52.073717, -0.541790
Location descriptions: A421 northbound between M1 and A428

A421 northbound access at a minor junction between M1 and A428

Feed validity status: Planned
Overall feed start: Mon, Mar 2, 2026 8:00 PM
Overall feed end: Tue, Mar 3, 2026 5:00 AM
Feed window length: 9 hours
Probability code (raw): probable
Compliance option (raw): mandatory
Source identification (raw): roadworks

Management type value: carriagewayClosures (Carriageway Closures)
Contra-flow flag (raw): false
Width restriction flag (raw): false
Height restriction flag (raw): false
Weight restriction flag (raw): false

Segment 1

5 coordinate pairs

Description: A421 northbound between M1 and A428
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A421
Linear Element Model: The Network Model
Linear Element Id: {C5008E43-C9F0-44EE-A62C-D6A1155BC601}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 251 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

52.067787 -0.54993
52.068251 -0.548661
52.06859 -0.547857
52.069013 -0.546996
52.069066 -0.546908

Segment 2

9 coordinate pairs

Description: A421 northbound access at a minor junction between M1 and A428
Lanes Restricted: 1 lane restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A421
Linear Element Model: The Network Model
Linear Element Id: {6624BF18-7468-49BD-83B8-9573473F9B3A}
Linear Element Type: A Carriageway Entry Slip
From Distance: 7 m
To Distance: 318 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

52.067051 -0.55419
52.06701 -0.55405
52.066972 -0.553851
52.066964 -0.553568
52.067003 -0.553213
52.067103 -0.552611
52.067231 -0.551995
52.067428 -0.551215
52.067787 -0.54993

Segment 3

2 coordinate pairs

Description: A421 northbound between M1 and A428
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A421
Linear Element Model: The Network Model
Linear Element Id: {45E9DEC8-64F4-4588-8C86-3172930485C9}
Linear Element Type: A Carriageway
From Distance: 126 m
To Distance: 192 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

52.078287 -0.533518
52.078692 -0.532813

Segment 4

3 coordinate pairs

Description: A421 northbound between M1 and A428
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End2
Linear Element Road: A421
Linear Element Model: The Network Model
Linear Element Id: {43F61869-F7E2-461A-A7DA-D379E62265E6}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 84 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

52.079971 -0.530313
52.080083 -0.530093
52.08047 -0.52939

Segment 5

2 coordinate pairs

Description: A421 northbound between M1 and A428
Carriageway: Dual Carriageway
Lanes Restricted: 2 lanes restricted
Operational Lanes: 0 operational lanes
Direction On Section: East Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A421
Linear Element Model: The Network Model
Linear Element Id: {EFB6CFEE-7DFB-4FE7-9C38-0398BED5D684}
Linear Element Type: B Carriageway
From Distance: 0 m
To Distance: 222 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

52.078692 -0.532813
52.079971 -0.530313

Geometry type: MultiLineString
Geometry points: 21
First coordinate pair: -0.549930, 52.067787
Road section segments: 1
Road section points: 21

View geometry JSON

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    "type": "MultiLineString",
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                52.06859
            ],
            [
                -0.546996,
                52.069013
            ],
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                52.069066
            ],
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            ],
            [
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            ],
            [
                -0.553851,
                52.066972
            ],
            [
                -0.553568,
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            ],
            [
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            ],
            [
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            ],
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            ],
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            ],
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            ],
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            ],
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            ],
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            ]
        ]
    ]
}

View road section coordinates

Cause type: Road Maintenance
Detailed cause: Maintenance Work
Compliance: Mandatory
Probability: Probable
Validity status: Planned
Road management: Carriageway Closures
Feed region label: northbound access at a minor