A12 northbound Jct 12 Mountnessing to Jct 15 Margaretting carriageway closure
ClearedA12 northbound Jct 12 Mountnessing to Jct 15 Margaretting carriageway closure
- Start time
- Wed, Oct 8, 2025 8:00 PM
- Expected end
- Thu, Oct 9, 2025 4:00 AM
- Duration
- 8 hours
- Road
- A12 – A12 Northbound Between B1002 And A414 Near Chelmsford (West)
- Category
- Road Maintenance
- Direction
- Northbound
- Carriageway
- Dual Carriageway
- Reason
- Roadworks
Live incident
Active roadworks
Planned
Cleared
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- First published
- Mon, Oct 6, 2025 2:33 PM
- Last updated
- Tue, Oct 7, 2025 9:50 PM
- Cleared
- Thu, Oct 9, 2025 4:00 AM
- Latest update: A12 northbound Jct 12 Mountnessing to Jct 15 Margaretting carriageway closure
- Coordinates
- 51.663285, 0.370906
- Latitude span
- 51.644076 – 51.695351
- Longitude span
- 0.337315 – 0.424765
- Bounding box centre
- 51.669714, 0.381040
- Location descriptions
-
- A12 northbound between B1002 and A414 near Chelmsford (west)
- A12 northbound access from A1023
- A12 northbound access from B1002
- A12 northbound between A1023 and B1002
- A12 northbound within the A1023 junction
- A12 northbound between M25 and A1023
- A12 northbound exit for A414 near Chelmsford (west)
- Feed validity status
- Planned
- Overall feed start
- Wed, Oct 8, 2025 8:00 PM
- Overall feed end
- Thu, Oct 9, 2025 4:00 AM
- Feed window length
- 8 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
18 coordinate pairs- Description
- A12 northbound between B1002 and A414 near Chelmsford (west)
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {77609B5B-2E78-4DB8-A903-8083555E6ACD}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 1,248 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.663956 0.368898 51.664604 0.369506 51.66528 0.370169 51.666079 0.370946 51.666733 0.371597 51.667447 0.372312 51.668257 0.373132 51.668909 0.373791 51.669489 0.374424 51.67008 0.375058 51.670451 0.37546 51.670997 0.376045 51.671545 0.376653 51.671894 0.377051 51.67234 0.377572 51.672728 0.378027 51.673166 0.378564 51.673333 0.378787
Segment 2
21 coordinate pairs- Description
- A12 northbound between B1002 and A414 near Chelmsford (west)
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 3 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {D28C671A-6E9D-4B8C-82AF-AA534761EBAD}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 1,642 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.676721 0.393782 51.676854 0.394049 51.677012 0.394328 51.67742 0.395016 51.677753 0.395467 51.678148 0.395922 51.678236 0.396014 51.678607 0.39638 51.679842 0.397531 51.681198 0.398783 51.681802 0.399341 51.682296 0.399801 51.682808 0.400277 51.683214 0.400645 51.683868 0.40123 51.684723 0.402042 51.685244 0.402514 51.687319 0.404393 51.68851 0.405516 51.688863 0.405849 51.689239 0.406213
Segment 3
9 coordinate pairs- Description
- A12 northbound access from A1023
- Lanes Restricted
- 1 lane restricted
- Operational Lanes
- 0 operational lanes
- 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
- {513E6E57-6C68-4D89-B4A1-4CF16C0FDF72}
- Linear Element Type
- A Carriageway Entry Slip
- From Distance
- 8 m
- To Distance
- 298 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.646417 0.344475 51.646366 0.345128 51.64634 0.345531 51.646321 0.346051 51.646309 0.346657 51.646315 0.347236 51.646337 0.347482 51.646398 0.348049 51.646476 0.348632
Segment 4
8 coordinate pairs- Description
- A12 northbound access from B1002
- Lanes Restricted
- 1 lane restricted
- Operational Lanes
- 0 operational lanes
- 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
- {F8AAE225-31F1-46FA-9B95-DB34BB2211D1}
- Linear Element Type
- A Carriageway Entry Slip
- From Distance
- 12 m
- To Distance
- 63 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.662081 0.365883 51.662108 0.365922 51.662131 0.36596 51.662214 0.366103 51.662231 0.366162 51.662273 0.366294 51.662303 0.366498 51.662305 0.366513
Segment 5
2 coordinate pairs- Description
- A12 northbound between B1002 and A414 near Chelmsford (west)
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {B0DFED9B-F055-4630-BC37-12749F773279}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 77 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.663347 0.368346 51.663956 0.368898
Segment 6
14 coordinate pairs- Description
- A12 northbound between A1023 and B1002
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {905388D7-D4D1-4549-87B3-17A1C4636D23}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 1,322 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.652995 0.358987 51.653338 0.359381 51.653707 0.359805 51.654077 0.360215 51.654377 0.360505 51.65462 0.360749 51.654879 0.361008 51.655268 0.361346 51.657 0.362868 51.658748 0.364379 51.659521 0.365041 51.66065 0.366029 51.662354 0.367513 51.663347 0.368346
Segment 7
20 coordinate pairs- Description
- A12 northbound between A1023 and B1002
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- North Bound
- Direction Relative
- Aligned
- Height Grade
- Start2 End1
- Linear Element Road
- A12
- Linear Element Model
- The Network Model
- Linear Element Id
- {C74DB73C-FE3F-4C2F-9CDC-A8FBEB6BA0D7}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 967 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.646704 0.349395 51.646806 0.349661 51.646909 0.349912 51.646969 0.350059 51.647073 0.350281 51.647185 0.350518 51.647254 0.350652 51.647437 0.350965 51.647611 0.351247 51.647742 0.351458 51.647908 0.351698 51.648222 0.352177 51.649243 0.353704 51.649531 0.354138 51.649951 0.354724 51.651306 0.356688 51.652303 0.35807 51.652612 0.358476 51.652978 0.358958 51.652995 0.358987
Segment 8
3 coordinate pairs- Description
- A12 northbound within the A1023 junction
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {B24FCFCC-F580-49F6-8013-0E60C3C519CF}
- 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
51.645997 0.34336 51.646049 0.343883 51.64609 0.344564
Segment 9
5 coordinate pairs- Description
- A12 northbound between A1023 and B1002
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- North Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End2
- Linear Element Road
- A12
- Linear Element Model
- The Network Model
- Linear Element Id
- {5984B461-2033-4933-A30B-F4BA6A6021A1}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 58 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.646476 0.348632 51.646594 0.349057 51.646645 0.349204 51.646687 0.349336 51.646704 0.349395
Segment 10
5 coordinate pairs- Description
- A12 northbound between B1002 and A414 near Chelmsford (west)
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 3 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {A49F3C6F-8D94-4340-8EF8-E9EB517C77FC}
- Linear Element Type
- A Carriageway
- From Distance
- 593 m
- To Distance
- 702 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.693834 0.420752 51.693865 0.421077 51.693905 0.42134 51.69396 0.421748 51.694034 0.422297
Segment 11
10 coordinate pairs- Description
- A12 northbound within the A1023 junction
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {3D26F1C7-0070-4E3F-B31B-0F7BA9A64F32}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 283 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.645083 0.339569 51.645227 0.340024 51.645321 0.340304 51.645482 0.340789 51.645683 0.341522 51.64579 0.34199 51.64588 0.342457 51.645928 0.342749 51.645975 0.343127 51.645997 0.34336
Segment 12
8 coordinate pairs- Description
- A12 northbound access from B1002
- Lanes Restricted
- 1 lane restricted
- Operational Lanes
- 0 operational lanes
- 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
- {254E5669-D6FE-4B86-930D-01D0B9D01798}
- Linear Element Type
- A Carriageway Entry Slip
- From Distance
- 0 m
- To Distance
- 181 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.662305 0.366513 51.662302 0.36677 51.662329 0.366945 51.662379 0.367144 51.662481 0.367344 51.662614 0.367515 51.662889 0.367787 51.663347 0.368346
Segment 13
2 coordinate pairs- Description
- A12 northbound between M25 and A1023
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {0DFBE01E-A097-4C2F-9534-F64555248566}
- Linear Element Type
- A Carriageway
- From Distance
- 611 m
- To Distance
- 803 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.644076 0.337315 51.645083 0.339569
Segment 14
24 coordinate pairs- Description
- A12 northbound between B1002 and A414 near Chelmsford (west)
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {2785111E-63A7-4D64-8765-3A61656D3D00}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 1,142 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.673333 0.378787 51.673527 0.379059 51.67392 0.379636 51.674188 0.380133 51.674456 0.380709 51.674598 0.381066 51.674736 0.381449 51.67493 0.382058 51.675092 0.382646 51.675249 0.383431 51.675365 0.384233 51.675423 0.385038 51.675452 0.385437 51.675452 0.385626 51.675448 0.386901 51.675458 0.388509 51.675491 0.389202 51.675572 0.389913 51.675639 0.390363 51.675767 0.391017 51.675973 0.391858 51.676204 0.392571 51.676452 0.39319 51.676721 0.393782
Segment 15
11 coordinate pairs- Description
- A12 northbound between A1023 and B1002
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- North Bound
- Direction Relative
- Aligned
- Height Grade
- Start2 End1
- Linear Element Road
- A12
- Linear Element Model
- The Network Model
- Linear Element Id
- {C74DB73C-FE3F-4C2F-9CDC-A8FBEB6BA0D7}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 209 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.646704 0.349395 51.646806 0.349661 51.646909 0.349912 51.646969 0.350059 51.647073 0.350281 51.647185 0.350518 51.647254 0.350652 51.647437 0.350965 51.647611 0.351247 51.647742 0.351458 51.647908 0.351698
Segment 16
5 coordinate pairs- Description
- A12 northbound between A1023 and B1002
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- Direction On Section
- North Bound
- Direction Relative
- Aligned
- Height Grade
- Start1 End2
- Linear Element Road
- A12
- Linear Element Model
- The Network Model
- Linear Element Id
- {5984B461-2033-4933-A30B-F4BA6A6021A1}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 58 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.646476 0.348632 51.646594 0.349057 51.646645 0.349204 51.646687 0.349336 51.646704 0.349395
Segment 17
8 coordinate pairs- Description
- A12 northbound within the A1023 junction
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {F0B6B784-F2A7-4735-835C-FBF8EFD997AE}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 287 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.64609 0.344564 51.646096 0.34562 51.646116 0.346416 51.646137 0.34672 51.646189 0.347243 51.646251 0.347753 51.646292 0.347957 51.646476 0.348632
Segment 18
11 coordinate pairs- Description
- A12 northbound exit for A414 near Chelmsford (west)
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {6B2D096E-6399-461C-B1CF-E466E4F28318}
- Linear Element Type
- A Carriageway Exit Slip
- From Distance
- 0 m
- To Distance
- 231 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.694034 0.422297 51.694192 0.422489 51.694293 0.422908 51.694387 0.423261 51.694506 0.423586 51.694644 0.423868 51.694705 0.423987 51.694844 0.424211 51.694993 0.424422 51.695168 0.424619 51.695351 0.424765
Segment 19
4 coordinate pairs- Description
- A12 northbound between B1002 and A414 near Chelmsford (west)
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {77609B5B-2E78-4DB8-A903-8083555E6ACD}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 177 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.663956 0.368898 51.664604 0.369506 51.66528 0.370169 51.66533 0.370217
Segment 20
2 coordinate pairs- Description
- A12 northbound between B1002 and A414 near Chelmsford (west)
- Carriageway
- Dual Carriageway
- Lanes Restricted
- 2 lanes restricted
- Operational Lanes
- 0 operational lanes
- 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
- {B0DFED9B-F055-4630-BC37-12749F773279}
- Linear Element Type
- A Carriageway
- From Distance
- 0 m
- To Distance
- 77 m
- Gml Srs Name
- EPSG::4326
- Gml Srs Dimension
- 2
Raw coordinate list
51.663347 0.368346 51.663956 0.368898
- Geometry type
- MultiLineString
- Geometry points
- 190
- First coordinate pair
- 0.368898, 51.663956
- Road section segments
- 1
- Road section points
- 190
View geometry JSON
{
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View road section coordinates
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- Cause type
- Road Maintenance
- Detailed cause
- Roadworks
- Compliance
- Mandatory
- Probability
- Probable
- Validity status
- Planned
- Road management
- Carriageway Closures
- Feed region label
- Chelmsford
- Feed provider
- National Highways
- Data source
- Roadworks
- Feed version
- 1
- Record created
- Mon, Oct 6, 2025 2:33 PM
- Record versioned
- Tue, Oct 7, 2025 9:50 PM
- Coordinate source
- Geometry
Driving on the A12? See every live closure, roadwork and planned restriction on this road.
A12 live closuresRelated incidents
A12 northbound Jct 11 to Jct 12 lane 2 closure
Cleared Roadworks National Highways
Havering
A12 · A12 Northbound Between M25 And A1023
Cleared 9 hours 15 minutes ago
Started 13 Jun 2026, 20:00
Ended 14 Jun 2026, 04:00
A12 northbound Jct 11 to Jct 12 lane 2 closure
Category: Road Maintenance
View update
A12 northbound Jct 15 to Jct 19 carriageway closure
Cleared Roadworks National Highways
Chelmsford
A12 · A12 Northbound Between B1007 And A1114/A130
Cleared 9 hours 15 minutes ago
Started 13 Jun 2026, 20:00
Ended 14 Jun 2026, 04:00
A12 northbound Jct 15 to Jct 19 carriageway closure
Category: Road Maintenance
View update
A12 northbound Ipswich Road exit slip carriageway closure
Cleared Roadworks National Highways
Colchester
A12 · A12 Northbound Between A120 Near Colchester (East) And B1029
Cleared 1 day 9 hours ago
Started 13 Jun 2026, 01:00
Ended 13 Jun 2026, 04:00
A12 northbound Ipswich Road exit slip carriageway closure
Category: Road Maintenance
View update
A12 northbound Jct 28 exit slip carriageway closure
Cleared Roadworks National Highways
Colchester
A12 · A12 Northbound Exit At A Minor Junction Between A133 And A120 Near Colchester (East)
Cleared 1 day 14 hours ago
Started 12 Jun 2026, 22:00
Ended 12 Jun 2026, 22:40
A12 northbound Jct 28 exit slip carriageway closure
Category: Road Maintenance
View update
A12 northbound Jct 28 entry slip carriageway closure
Cleared Roadworks National Highways
Colchester
A12 · A12 Northbound Between A133 And A120 Near Colchester (East)
Cleared 1 day 17 hours ago
Started 12 Jun 2026, 20:00
Ended 12 Jun 2026, 20:00
A12 northbound Jct 28 entry slip carriageway closure
Category: Road Maintenance
View update
A12 northbound Jct 15 to Jct 19 carriageway closure
Cleared Roadworks National Highways
Chelmsford
A12 · A12 Northbound Between B1007 And A1114/A130
Cleared 1 day 17 hours ago
Started 12 Jun 2026, 20:00
Ended 12 Jun 2026, 20:00
A12 northbound Jct 15 to Jct 19 carriageway closure
Category: Road Maintenance
View update