A421 eastbound - Cardington Jct to Black Cat roundabout - carriageway closure and slip road closure
ClearedA421 eastbound - Cardington Jct to Black Cat roundabout - carriageway closure and slip road closure
- Start time
- Tue, Mar 24, 2026 9:00 PM
- Expected end
- Wed, Mar 25, 2026 5:00 AM
- Duration
- 8 hours
- Road
- A421 – A421 Northbound Between A4280 And A1
- Category
- Construction Work
- Direction
- Eastbound
- Carriageway
- Dual Carriageway
- Reason
- Road Improvement Or Upgrading
Move Insights
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- First published
- Sat, Mar 14, 2026 4:05 AM
- Last updated
- Tue, Mar 24, 2026 4:49 AM
- Cleared
- Wed, Mar 25, 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 between A4280 and A1
- roundabout at A1/A421
- A421 northbound between A603 and A4280
- A421 northbound within the A603 junction
- A421 northbound access from A603
- A421 northbound access from A4280
- A421 northbound between A600 and A603
- Feed validity status
- Planned
- Overall feed start
- Tue, Mar 24, 2026 9:00 PM
- Overall feed end
- Wed, Mar 25, 2026 5:00 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
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 2
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 3
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 4
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 5
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 6
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 7
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 8
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 9
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 10
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 11
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 12
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
Segment 13
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 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
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 16
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 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
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 19
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 20
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 21
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 22
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 23
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
- Geometry type
- MultiLineString
- Geometry points
- 182
- First coordinate pair
- -0.349233, 52.168574
- Road section segments
- 1
- Road section points
- 182
View geometry JSON
{
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52.168574
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52.168625
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- 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
- 98
- Record created
- Sat, Mar 14, 2026 4:05 AM
- Record versioned
- Tue, Mar 24, 2026 4:49 AM
- Coordinate source
- Geometry
Driving on the A421? See every live closure, roadwork and planned restriction on this road.
A421 live closuresRelated incidents
A1 southbound Tempsford to Sandy lane closure (MP 80/8 to 80/2)
Planned Roadworks National HighwaysStarts in 19 hours 24 minutes
A1 southbound Tempsford to Sandy lane closure (MP 80/8 to 80/2)
A421 westbound Approach to Cardington lane 2 closure
Planned Roadworks National HighwaysStarts in 18 hours 24 minutes
A421 westbound Approach to Cardington lane 2 closure
A1 northbound Wyboston to Buckden carriageway closure
Cleared Roadworks National HighwaysCleared 1 day 20 hours ago
A1 northbound Wyboston to Buckden carriageway closure
A421 eastbound Elstow to Cardington A603 Interchange lane 2 closure
Cleared Roadworks National HighwaysCleared 2 days 34 minutes ago
A421 eastbound Elstow to Cardington A603 Interchange lane 2 closure
A421 westbound Approach to Cardington lane 2 closure
Cleared Roadworks National HighwaysCleared 1 day 19 hours ago
A421 westbound Approach to Cardington lane 2 closure
A421 eastbound Elstow to Cardington A603 Interchange lane 2 closure
Cleared Roadworks National HighwaysCleared 2 days 5 hours ago
A421 eastbound Elstow to Cardington A603 Interchange lane 2 closure