A1 northbound Tempsford to Black Cat Roundabout carriageway closure

Cleared

Start time: Fri, Apr 24, 2026 8:00 PM
Expected end: Mon, Apr 27, 2026 4:00 AM
Duration: 2 days 8 hours
Road: A1 – A1 Northbound Between A603 And A421
Category: Construction Work
Direction: Northbound
Carriageway: Dual Carriageway
Reason: Road Improvement Or Upgrading

Live incident

Active roadworks

Planned

Cleared

Hover or tap markers for full details

Move Insights

Thinking of moving to this area?

Check flood risk, planning history, EPC ratings and more with a Move Insights property report.

Flood risk assessment

Planning history

EPC ratings & more

Get a property report

First published: Fri, Apr 24, 2026 11:34 PM
Last updated: Mon, Apr 27, 2026 12:05 AM
Cleared: Mon, Apr 27, 2026 4:00 AM

Latest update: A1 northbound Tempsford to Black Cat Roundabout carriageway closure

Coordinates: 52.156733, -0.301856
Latitude span: 52.156231 – 52.157857
Longitude span: -0.302064 – -0.301730
Bounding box centre: 52.157044, -0.301897
Location descriptions: A1 northbound between A603 and A421

A1 northbound at a minor junction between A603 and A421

Feed validity status: Active
Overall feed start: Fri, Apr 24, 2026 8:00 PM
Overall feed end: Mon, Apr 27, 2026 4:00 AM
Feed window length: 2 days 8 hours
Probability code (raw): certain
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

4 coordinate pairs

Description: A1 northbound between A603 and A421
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: {F23DC59D-F402-4BEB-8774-93B0B9B5C7CE}
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

52.156809 -0.30173
52.156845 -0.301734
52.157709 -0.301813
52.157857 -0.301831

Segment 2

7 coordinate pairs

Description: A1 northbound at a minor junction between A603 and A421
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: A1
Linear Element Model: The Network Model
Linear Element Id: {39728242-A37B-43C7-8520-E0ED234DD25B}
Linear Element Type: A Carriageway Entry Slip
From Distance: 13 m
To Distance: 84 m
Gml Srs Name: EPSG::4326
Gml Srs Dimension: 2

Raw coordinate list

52.156231 -0.302064
52.156238 -0.302044
52.15629 -0.301955
52.156352 -0.301879
52.156406 -0.301848
52.156513 -0.301785
52.156809 -0.30173

Geometry type: MultiLineString
Geometry points: 11
First coordinate pair: -0.301730, 52.156809
Road section segments: 1
Road section points: 11

View geometry JSON

{
    "type": "MultiLineString",
    "coordinates": [
        [
            [
                -0.30173,
                52.156809
            ],
            [
                -0.301734,
                52.156845
            ],
            [
                -0.301813,
                52.157709
            ],
            [
                -0.301831,
                52.157857
            ],
            [
                -0.302064,
                52.156231
            ],
            [
                -0.302044,
                52.156238
            ],
            [
                -0.301955,
                52.15629
            ],
            [
                -0.301879,
                52.156352
            ],
            [
                -0.301848,
                52.156406
            ],
            [
                -0.301785,
                52.156513
            ],
            [
                -0.30173,
                52.156809
            ]
        ]
    ]
}

View road section coordinates

Cause type: Construction Work
Detailed cause: Road Improvement Or Upgrading
Compliance: Mandatory
Probability: Certain
Validity status: Active
Road management: Carriageway Closures
Feed region label: northbound at a minor