A12 northbound Jct 20a to Jct 21 lane closure (MP 135/5 to 137/0)

Planned

Start time: Mon, Dec 1, 2025 9:00 PM
Expected end: Tue, Dec 2, 2025 5:00 AM
Duration: 8 hours
Road: A12 – A12 Northbound Within The B1137 Junction
Category: Construction Work
Direction: Northbound
Carriageway: Dual Carriageway
Lanes affected: Lane 2 closed, 1 of 1 lanes affected
Reason: Construction Work

Active

Planned

Cleared

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First published: Wed, Apr 2, 2025 7:05 AM
Last updated: Mon, Dec 1, 2025 2:42 AM
Cleared: Tue, Dec 2, 2025 5:00 AM

Latest update: A12 northbound Jct 20a to Jct 21 lane closure (MP 135/5 to 137/0)

Coordinates: 51.779323, 0.604141
Latitude span: 51.777351 – 51.781687
Longitude span: 0.595674 – 0.612067
Bounding box centre: 51.779519, 0.603871
Location descriptions: A12 northbound within the B1137 junction

A12 northbound between B1137 and B1389 near Witham (south)

Feed validity status: Planned
Overall feed start: Mon, Dec 1, 2025 9:00 PM
Overall feed end: Tue, Dec 2, 2025 5:00 AM
Feed window length: 8 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: A12 northbound within the B1137 junction
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: North Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A12
Linear Element Model: The Network Model
Linear Element Id: {1F25CF15-B1E6-4F3D-93D0-5261800CD245}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 326 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.778239 0.599624
51.77828 0.59983
51.778375 0.600401
51.778638 0.602359
51.77875 0.602974
51.778807 0.603238
51.779045 0.604168

Segment 2

11 coordinate pairs

Description: A12 northbound between B1137 and B1389 near Witham (south)
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: North Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A12
Linear Element Model: The Network Model
Linear Element Id: {87228FE9-B9C4-45C0-B1D4-364DB9726EE4}
Linear Element Type: A Carriageway
From Distance: 0 m
To Distance: 619 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.779045 0.604168
51.779222 0.604799
51.779626 0.60604
51.780285 0.607977
51.780309 0.60808
51.780352 0.608199
51.78047 0.608554
51.781203 0.610771
51.781271 0.610963
51.781568 0.611763
51.781687 0.612067

Segment 3

5 coordinate pairs

Description: A12 northbound within the B1137 junction
Carriageway: Dual Carriageway
Lane Usage: Cl2
Lane Number: 2
Lane Status: Closed
Lane Direction: Aligned
Lanes Restricted: 1 lane restricted
Operational Lanes: 1 operational lane
Direction On Section: North Bound
Direction Relative: Aligned
Height Grade: Start1 End1
Linear Element Road: A12
Linear Element Model: The Network Model
Linear Element Id: {DE98F077-C0DF-45E3-9965-ED55E94E67E3}
Linear Element Type: A Carriageway
From Distance: 126 m
To Distance: 416 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

51.777351 0.595674
51.777553 0.596482
51.777938 0.598186
51.778175 0.599302
51.778239 0.599624

Geometry type: MultiLineString
Geometry points: 23
First coordinate pair: 0.599624, 51.778239
Road section segments: 1
Road section points: 23

View geometry JSON

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    "type": "MultiLineString",
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}

View road section coordinates

Cause type: Construction Work
Detailed cause: Construction Work
Compliance: Mandatory
Probability: Probable
Validity status: Planned
Road management: Other
Feed region label: Witham