Crash View

A1 northbound Black Cat Roundabout to Wyboston carriageway closure

Cleared

A1 northbound Black Cat Roundabout to Wyboston carriageway closure

Start time
Fri, Mar 27, 2026 9:00 PM
Expected end
Sat, Mar 28, 2026 5:00 AM
Duration
8 hours
Road
A1 – A1 Northbound Between A421 And A428
Category
Construction Work
Direction
Northbound
Carriageway
Dual Carriageway
Reason
Road Improvement Or Upgrading
Live incident
Active roadworks
Planned
Cleared
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First published
Thu, Feb 26, 2026 8:36 PM
Last updated
Fri, Mar 27, 2026 8:11 AM
Cleared
Sat, Mar 28, 2026 5:00 AM
  • Latest update: A1 northbound Black Cat Roundabout to Wyboston carriageway closure
Coordinates
52.191441, -0.300595
Latitude span
52.185010 – 52.199195
Longitude span
-0.305215 – -0.297521
Bounding box centre
52.192103, -0.301368
Location descriptions
  • A1 northbound between A421 and A428
Feed validity status
Planned
Overall feed start
Fri, Mar 27, 2026 9:00 PM
Overall feed end
Sat, Mar 28, 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

14 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{18DFE4F6-EDE5-4D5E-87C2-6D7D26A2D254}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
469 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.195034 -0.298566
52.195705 -0.298507
52.196504 -0.298404
52.196701 -0.298367
52.196719 -0.298361
52.196799 -0.298334
52.196916 -0.2983
52.197211 -0.29823
52.197561 -0.298129
52.198259 -0.297912
52.19833 -0.297883
52.198956 -0.297622
52.199117 -0.297558
52.199195 -0.297521

Segment 2

2 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{CE3F8B54-6ADE-44FF-AE5C-6C6AAB810846}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
35 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.194717 -0.298574
52.195034 -0.298566

Segment 3

14 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{3C0C3E4A-81F1-4BD8-AF06-DAFFDEBB02B1}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
405 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.187355 -0.302845
52.187864 -0.302274
52.1879 -0.302243
52.187997 -0.302137
52.18844 -0.301681
52.188715 -0.301422
52.18884 -0.301315
52.189063 -0.301145
52.189204 -0.301038
52.189739 -0.30071
52.190007 -0.300568
52.190123 -0.300505
52.190552 -0.300299
52.190614 -0.300267

Segment 4

6 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{D7B32E24-F591-460D-8F15-6FCE2DADA35E}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
171 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.18543 -0.304545
52.185772 -0.304314
52.185989 -0.304146
52.186406 -0.303819
52.186573 -0.303657
52.186806 -0.303433

Segment 5

3 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{80C563E6-D745-451F-965F-96EF9A27E27A}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
73 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.186806 -0.303433
52.186971 -0.303275
52.187355 -0.302845

Segment 6

5 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{3B2DE493-7B6B-4BAD-B35C-36DF883723BE}
Linear Element Type
A Carriageway
From Distance
10 m
To Distance
78 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.18501 -0.305215
52.185088 -0.304965
52.185237 -0.304733
52.185357 -0.304604
52.18543 -0.304545

Segment 7

4 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{A1C1B2B1-64AC-403C-8271-0B1A3843FB42}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
224 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.190614 -0.300267
52.192066 -0.299348
52.192361 -0.299191
52.192504 -0.299112

Segment 8

9 coordinate pairs
Description
A1 northbound between A421 and A428
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
A1
Linear Element Model
The Network Model
Linear Element Id
{9F187952-BF18-44DA-9427-193A164203F0}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
250 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.192504 -0.299112
52.192673 -0.299018
52.192878 -0.298922
52.193066 -0.298842
52.193299 -0.298775
52.193666 -0.298688
52.193882 -0.298679
52.194519 -0.298596
52.194717 -0.298574
Geometry type
MultiLineString
Geometry points
57
First coordinate pair
-0.298566, 52.195034
Road section segments
1
Road section points
57
View geometry JSON 
{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.298566,
                52.195034
            ],
            [
                -0.298507,
                52.195705
            ],
            [
                -0.298404,
                52.196504
            ],
            [
                -0.298367,
                52.196701
            ],
            [
                -0.298361,
                52.196719
            ],
            [
                -0.298334,
                52.196799
            ],
            [
                -0.2983,
                52.196916
            ],
            [
                -0.29823,
                52.197211
            ],
            [
                -0.298129,
                52.197561
            ],
            [
                -0.297912,
                52.198259
            ],
            [
                -0.297883,
                52.19833
            ],
            [
                -0.297622,
                52.198956
            ],
            [
                -0.297558,
                52.199117
            ],
            [
                -0.297521,
                52.199195
            ],
            [
                -0.298574,
                52.194717
            ],
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                -0.298566,
                52.195034
            ],
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                -0.302845,
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            ],
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                -0.302274,
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            ],
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                -0.302243,
                52.1879
            ],
            [
                -0.302137,
                52.187997
            ],
            [
                -0.301681,
                52.18844
            ],
            [
                -0.301422,
                52.188715
            ],
            [
                -0.301315,
                52.18884
            ],
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                -0.301145,
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            ],
            [
                -0.301038,
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            ],
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                -0.30071,
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            ],
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                -0.300568,
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            ],
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            ],
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            ],
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                52.190614
            ],
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            ],
            [
                -0.304314,
                52.185772
            ],
            [
                -0.304146,
                52.185989
            ],
            [
                -0.303819,
                52.186406
            ],
            [
                -0.303657,
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            ],
            [
                -0.303433,
                52.186806
            ],
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                -0.303433,
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            ],
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                -0.303275,
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            ],
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            ],
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                -0.304965,
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            ],
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                -0.304733,
                52.185237
            ],
            [
                -0.304604,
                52.185357
            ],
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                -0.304545,
                52.18543
            ],
            [
                -0.300267,
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            ],
            [
                -0.299348,
                52.192066
            ],
            [
                -0.299191,
                52.192361
            ],
            [
                -0.299112,
                52.192504
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            [
                -0.299112,
                52.192504
            ],
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            ],
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            ],
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            ],
            [
                -0.298596,
                52.194519
            ],
            [
                -0.298574,
                52.194717
            ]
        ]
    ]
}
View road section coordinates 
[
    [
        [
            -0.298566,
            52.195034
        ],
        [
            -0.298507,
            52.195705
        ],
        [
            -0.298404,
            52.196504
        ],
        [
            -0.298367,
            52.196701
        ],
        [
            -0.298361,
            52.196719
        ],
        [
            -0.298334,
            52.196799
        ],
        [
            -0.2983,
            52.196916
        ],
        [
            -0.29823,
            52.197211
        ],
        [
            -0.298129,
            52.197561
        ],
        [
            -0.297912,
            52.198259
        ],
        [
            -0.297883,
            52.19833
        ],
        [
            -0.297622,
            52.198956
        ],
        [
            -0.297558,
            52.199117
        ],
        [
            -0.297521,
            52.199195
        ],
        [
            -0.298574,
            52.194717
        ],
        [
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            52.195034
        ],
        [
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            52.187355
        ],
        [
            -0.302274,
            52.187864
        ],
        [
            -0.302243,
            52.1879
        ],
        [
            -0.302137,
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        ],
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            -0.301681,
            52.18844
        ],
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        ],
        [
            -0.301315,
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        ],
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            52.189063
        ],
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            52.189204
        ],
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            52.189739
        ],
        [
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            52.190007
        ],
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            -0.300505,
            52.190123
        ],
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            -0.300299,
            52.190552
        ],
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            -0.300267,
            52.190614
        ],
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            -0.304545,
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        ],
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            52.185772
        ],
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            52.185989
        ],
        [
            -0.303819,
            52.186406
        ],
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            -0.303657,
            52.186573
        ],
        [
            -0.303433,
            52.186806
        ],
        [
            -0.303433,
            52.186806
        ],
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            -0.303275,
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        ],
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            -0.302845,
            52.187355
        ],
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            -0.305215,
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        ],
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            -0.304965,
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        ],
        [
            -0.304733,
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        ],
        [
            -0.304604,
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        ],
        [
            -0.304545,
            52.18543
        ],
        [
            -0.300267,
            52.190614
        ],
        [
            -0.299348,
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        ],
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            -0.299191,
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        ],
        [
            -0.299112,
            52.192504
        ],
        [
            -0.299112,
            52.192504
        ],
        [
            -0.299018,
            52.192673
        ],
        [
            -0.298922,
            52.192878
        ],
        [
            -0.298842,
            52.193066
        ],
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            -0.298775,
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        ],
        [
            -0.298688,
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        ],
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            -0.298679,
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        ],
        [
            -0.298596,
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        ],
        [
            -0.298574,
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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
97
Record created
Thu, Feb 26, 2026 8:36 PM
Record versioned
Fri, Mar 27, 2026 8:11 AM
Coordinate source
Geometry

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