A421 eastbound - Cardington Jct to Black Cat roundabout - carriageway closure and slip road closure

Planned

A421 eastbound - Cardington Jct to Black Cat roundabout - carriageway closure and slip road closure

Start time
Thu, Jun 4, 2026 7:00 PM
Expected end
Fri, Jun 5, 2026 5:00 AM
Duration
10 hours
Road
A421 – A421 Northbound Access From A603
Category
Construction Work
Direction
Eastbound
Carriageway
Dual Carriageway
Reason
Road Improvement Or Upgrading
Active
Planned
Cleared
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First published
Mon, Apr 27, 2026 9:27 AM
Last updated
Thu, Jun 4, 2026 12:23 AM
Cleared
Fri, Jun 5, 2026 5:00 AM
  • Latest update: A421 eastbound - Cardington Jct to Black Cat roundabout - carriageway closure and slip road closure
Coordinates
52.150675, -0.379301
Latitude span
52.120237 – 52.184942
Longitude span
-0.426936 – -0.305895
Bounding box centre
52.152590, -0.366416
Location descriptions
  • A421 northbound access from A603
  • A421 northbound between A4280 and A1
  • roundabout at A1/A421
  • A421 northbound within the A603 junction
  • A421 northbound between A603 and A4280
  • A421 northbound between A600 and A603
  • A421 northbound access from A4280
Feed validity status
Planned
Overall feed start
Thu, Jun 4, 2026 7:00 PM
Overall feed end
Fri, Jun 5, 2026 5:00 AM
Feed window length
10 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

15 coordinate pairs
Description
A421 northbound access from A603
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
{67CED0D7-CC4E-492E-951F-A5CB1A126A11}
Linear Element Type
A Carriageway Entry Slip
From Distance
5 m
To Distance
384 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.124824 -0.419995
52.124841 -0.419914
52.124859 -0.419855
52.124893 -0.419766
52.124937 -0.419677
52.12499 -0.419572
52.125078 -0.419452
52.125555 -0.418793
52.125687 -0.418613
52.125908 -0.418357
52.126572 -0.417574
52.126626 -0.417517
52.126643 -0.417498
52.127166 -0.416939
52.127467 -0.416563

Segment 2

8 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{10BD84F2-0C28-4FE4-8522-71B850B6E7A9}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
431 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.184614 -0.312151
52.184761 -0.311173
52.184896 -0.31004
52.18493 -0.309147
52.184942 -0.308127
52.184876 -0.307238
52.184734 -0.306095
52.184742 -0.305928

Segment 3

2 coordinate pairs
Description
roundabout at A1/A421
Lanes Restricted
3 lanes restricted
Operational Lanes
0 operational lanes
Direction On Section
Clockwise
Direction Relative
Aligned
Height Grade
Start1 End1
Linear Element Road
A1
Linear Element Model
The Network Model
Linear Element Id
{82E947A7-0D56-4064-BA0D-43CE06A4064C}
Linear Element Type
Other
From Distance
0 m
To Distance
4 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.184742 -0.305928
52.184778 -0.305895

Segment 4

10 coordinate pairs
Description
A421 northbound within the A603 junction
Carriageway
Dual Carriageway
Lanes Restricted
2 lanes restricted
Operational Lanes
0 operational lanes
Direction On Section
East Bound
Direction Relative
Aligned
Height Grade
Start2 End1
Linear Element Road
A421
Linear Element Model
The Network Model
Linear Element Id
{7E780AE3-A2F3-4BC4-BD6A-A1EB9EC9BAB2}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
378 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.124602 -0.419528
52.12477 -0.419317
52.125355 -0.418639
52.125647 -0.418322
52.125895 -0.41805
52.126392 -0.417551
52.126623 -0.417331
52.126854 -0.417111
52.127387 -0.416639
52.127467 -0.416563

Segment 5

7 coordinate pairs
Description
A421 northbound between A603 and A4280
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
{ABA9F3D5-9098-47DE-85AE-05F4A7F87D8D}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
393 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.127467 -0.416563
52.127778 -0.416304
52.127787 -0.416303
52.128277 -0.415921
52.128668 -0.415629
52.12947 -0.41506
52.130728 -0.414358

Segment 6

3 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{169DEDDB-B7BE-433C-9960-B2B47F8F1558}
Linear Element Type
A Carriageway
From Distance
647 m
To Distance
748 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.168468 -0.353327
52.16851 -0.352663
52.168537 -0.351859

Segment 7

7 coordinate pairs
Description
A421 northbound between A603 and A4280
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
{D0BF256C-4BD4-4EB3-B7B4-BEFFB5AE0705}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
344 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.138623 -0.408149
52.138762 -0.407994
52.139363 -0.407272
52.13954 -0.407046
52.140088 -0.40634
52.140512 -0.405769
52.141041 -0.405014

Segment 8

3 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{A0907D2B-FE9F-42CC-BB0A-F537783E843B}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
116 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.168574 -0.349233
52.168599 -0.348219
52.168625 -0.347535

Segment 9

14 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{A0907D2B-FE9F-42CC-BB0A-F537783E843B}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
1,487 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.168574 -0.349233
52.168599 -0.348219
52.168654 -0.346754
52.16874 -0.345621
52.168897 -0.3441
52.169221 -0.341881
52.169441 -0.340638
52.169977 -0.338227
52.170274 -0.337112
52.170836 -0.335339
52.171406 -0.33375
52.171979 -0.332371
52.172779 -0.330668
52.173428 -0.329495

Segment 10

8 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{169DEDDB-B7BE-433C-9960-B2B47F8F1558}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
748 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.167003 -0.362447
52.167437 -0.360681
52.167749 -0.359084
52.168004 -0.357691
52.168224 -0.356089
52.168422 -0.354041
52.16851 -0.352663
52.168537 -0.351859

Segment 11

6 coordinate pairs
Description
A421 northbound between A603 and A4280
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
{ABA9F3D5-9098-47DE-85AE-05F4A7F87D8D}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
233 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.127467 -0.416563
52.127778 -0.416304
52.127787 -0.416303
52.128277 -0.415921
52.128668 -0.415629
52.129369 -0.415132

Segment 12

4 coordinate pairs
Description
A421 northbound within the A603 junction
Carriageway
Dual Carriageway
Lanes Restricted
2 lanes restricted
Operational Lanes
0 operational lanes
Direction On Section
East Bound
Direction Relative
Aligned
Height Grade
Start2 End2
Linear Element Road
A421
Linear Element Model
The Network Model
Linear Element Id
{EDA9BAD7-B582-44FD-BD75-8C84593114E0}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
91 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.123957 -0.420354
52.124054 -0.420234
52.124089 -0.420189
52.124602 -0.419528

Segment 13

5 coordinate pairs
Description
A421 northbound between A600 and A603
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
{CE9F674E-16D0-4D32-B50F-5C29D6247B88}
Linear Element Type
A Carriageway
From Distance
577 m
To Distance
744 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.120237 -0.426936
52.120311 -0.426764
52.120608 -0.426081
52.120826 -0.425606
52.121133 -0.424982

Segment 14

3 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 lanes restricted
Operational Lanes
0 operational lanes
Direction On Section
East Bound
Direction Relative
Aligned
Height Grade
Start2 End1
Linear Element Road
A421
Linear Element Model
The Network Model
Linear Element Id
{092BBE71-B517-4BBE-949F-D542B5A1A7FB}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
273 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.161904 -0.373494
52.162783 -0.372215
52.163677 -0.37073

Segment 15

10 coordinate pairs
Description
A421 northbound access from A4280
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
A4280
Linear Element Model
The Network Model
Linear Element Id
{BBC6C434-5FDC-4A15-967D-BE7CE2AEFEF4}
Linear Element Type
A Carriageway Entry Slip
From Distance
12 m
To Distance
420 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.152247 -0.38592
52.152233 -0.385827
52.152222 -0.385648
52.152269 -0.385461
52.152417 -0.384977
52.152642 -0.38437
52.152931 -0.383668
52.153325 -0.38287
52.153561 -0.382489
52.154363 -0.381219

Segment 16

10 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{0DF6F4C3-B339-F51E-C116-04F171D5DBE1}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
792 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.173428 -0.329495
52.173714 -0.328978
52.173985 -0.328543
52.174883 -0.327156
52.17629 -0.325353
52.176728 -0.324847
52.176731 -0.324843
52.177738 -0.323678
52.178686 -0.322547
52.178954 -0.322234

Segment 17

10 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{5D5E96DF-FA06-4427-9F9C-7D7219175255}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
954 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.178954 -0.322234
52.180692 -0.320206
52.181646 -0.319086
52.182718 -0.317413
52.183046 -0.3168
52.183628 -0.315511
52.184047 -0.314303
52.184361 -0.313239
52.184586 -0.312307
52.184614 -0.312151

Segment 18

4 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{CFE667C0-B87B-4656-8AA0-8A602629C2FD}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
179 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.168537 -0.351859
52.168556 -0.351286
52.168558 -0.350448
52.168574 -0.349233

Segment 19

18 coordinate pairs
Description
A421 northbound between A603 and A4280
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
{F3419297-9958-44C5-9BDF-22C24E516D49}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
979 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.130728 -0.414358
52.130755 -0.414343
52.131424 -0.413968
52.132379 -0.413409
52.133128 -0.412929
52.133965 -0.412373
52.134147 -0.412235
52.13449 -0.411975
52.135096 -0.411515
52.135451 -0.411225
52.136127 -0.410645
52.13666 -0.410173
52.137246 -0.409597
52.137574 -0.409264
52.138079 -0.408735
52.138611 -0.40816
52.138622 -0.408149
52.138623 -0.408149

Segment 20

4 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{CFE667C0-B87B-4656-8AA0-8A602629C2FD}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
179 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.168537 -0.351859
52.168556 -0.351286
52.168558 -0.350448
52.168574 -0.349233

Segment 21

11 coordinate pairs
Description
A421 northbound within the A603 junction
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
{540F6133-A809-498D-B2A6-FC398E484295}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
447 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.121133 -0.424982
52.121159 -0.424923
52.121378 -0.424491
52.121685 -0.423925
52.121975 -0.423404
52.122276 -0.422882
52.122388 -0.422688
52.122916 -0.421837
52.123189 -0.421433
52.123604 -0.420834
52.123957 -0.420354

Segment 22

13 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{061170C3-77A1-4319-A28C-CA44FF2019D9}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
993 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.154363 -0.381219
52.154787 -0.380692
52.155236 -0.380153
52.155595 -0.379771
52.155718 -0.379646
52.156605 -0.378742
52.157413 -0.378048
52.158319 -0.377324
52.159046 -0.376673
52.159922 -0.37585
52.161077 -0.374551
52.161869 -0.373545
52.161904 -0.373494

Segment 23

7 coordinate pairs
Description
A421 northbound between A4280 and A1
Carriageway
Dual Carriageway
Lanes Restricted
3 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
{05A6519F-5185-4F43-A53A-3297F8DA93C8}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
680 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list
52.163677 -0.37073
52.16403 -0.370116
52.164972 -0.368181
52.165521 -0.366943
52.165905 -0.365922
52.166418 -0.364441
52.167003 -0.362447
Geometry type
MultiLineString
Geometry points
182
First coordinate pair
-0.419995, 52.124824
Road section segments
1
Road section points
182
View geometry JSON
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        ],
        [
            -0.373545,
            52.161869
        ],
        [
            -0.373494,
            52.161904
        ],
        [
            -0.37073,
            52.163677
        ],
        [
            -0.370116,
            52.16403
        ],
        [
            -0.368181,
            52.164972
        ],
        [
            -0.366943,
            52.165521
        ],
        [
            -0.365922,
            52.165905
        ],
        [
            -0.364441,
            52.166418
        ],
        [
            -0.362447,
            52.167003
        ]
    ]
]
Cause type
Construction Work
Detailed cause
Road Improvement Or Upgrading
Compliance
Mandatory
Probability
Probable
Validity status
Planned
Road management
Carriageway Closures
Feed provider
National Highways
Data source
Roadworks
Feed version
105
Record created
Mon, Apr 27, 2026 9:27 AM
Record versioned
Thu, Jun 4, 2026 12:23 AM
Coordinate source
Geometry

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