Crash View

A421 eastbound M1 Jct 13 to A6 Marsh Leys carriageway closure

Cleared

A421 eastbound M1 Jct 13 to A6 Marsh Leys carriageway closure

Start time
Sun, Sep 20, 2026 7:24 PM
Expected end
Mon, Sep 21, 2026 5:00 AM
Duration
8 hours 11 minutes 2 seconds
Road
A421 – A421 Northbound Access At A Minor Junction Between M1 And A428
Category
Road Maintenance
Direction
Eastbound
Carriageway
Dual Carriageway
Reason
Road Marking Work
Live incident
Active roadworks
Planned
Cleared
Hover or tap markers for full details

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First published
Sun, Sep 20, 2026 7:24 PM
Last updated
Mon, Sep 21, 2026 12:42 AM
Cleared
Mon, Sep 21, 2026 3:35 AM
  • Latest update: A421 eastbound M1 Jct 13 to A6 Marsh Leys carriageway closure
Coordinates
52.047307, -0.583320
Latitude span
52.027022 – 52.069066
Longitude span
-0.608830 – -0.546908
Bounding box centre
52.048044, -0.577869
Location descriptions
  • A421 northbound access at a minor junction between M1 and A428
  • A421 northbound within the M1 J13 junction
  • A421 northbound between M1 and A428
  • A421 southbound between A428 and M1
Feed validity status
Active
Overall feed start
Sun, Sep 20, 2026 7:24 PM
Overall feed end
Mon, Sep 21, 2026 5:00 AM
Feed window length
9 hours 36 minutes
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

9 coordinate pairs
Description
A421 northbound access at a minor junction between M1 and A428
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
{6624BF18-7468-49BD-83B8-9573473F9B3A}
Linear Element Type
A Carriageway Entry Slip
From Distance
7 m
To Distance
318 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.067051 -0.55419
52.06701 -0.55405
52.066972 -0.553851
52.066964 -0.553568
52.067003 -0.553213
52.067103 -0.552611
52.067231 -0.551995
52.067428 -0.551215
52.067787 -0.54993

Segment 2

2 coordinate pairs
Description
A421 northbound within the M1 J13 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
{4617AB9F-1924-4C2F-92B9-D2E190DB9D4F}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
14 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.029457 -0.606998
52.029573 -0.606914

Segment 3

10 coordinate pairs
Description
A421 northbound between M1 and A428
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
{FE13AACA-043D-41CE-8593-F660033FF393}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
644 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.038448 -0.593633
52.038884 -0.592978
52.039288 -0.59248
52.03972 -0.592011
52.040198 -0.591578
52.040855 -0.591049
52.041964 -0.590268
52.042577 -0.58992
52.043506 -0.589435
52.043562 -0.58941

Segment 4

2 coordinate pairs
Description
A421 northbound within the M1 J13 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
{51E7CF38-A4CA-4CB8-8A68-45857ADCCC83}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
185 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.027932 -0.608094
52.029457 -0.606998

Segment 5

9 coordinate pairs
Description
A421 southbound between A428 and M1
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
{000F70F7-EC68-493B-8017-67A2BD5C03AD}
Linear Element Type
B Carriageway
From Distance
0 m
To Distance
776 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.060339 -0.569387
52.06136 -0.568264
52.061751 -0.567763
52.062324 -0.566894
52.062725 -0.566224
52.063572 -0.564401
52.063859 -0.563567
52.064192 -0.562532
52.064651 -0.560784

Segment 6

2 coordinate pairs
Description
A421 northbound between M1 and A428
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
{ED007721-F8B0-42D9-84E0-3BB4E9FC38CD}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
49 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.0518 -0.579095
52.05211 -0.578586

Segment 7

4 coordinate pairs
Description
A421 northbound within the M1 J13 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
{2A5588A6-05DC-4636-ABFC-51E38EF201F4}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
493 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.029573 -0.606914
52.031267 -0.605683
52.032864 -0.604439
52.033556 -0.603761

Segment 8

4 coordinate pairs
Description
A421 northbound within the M1 J13 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
{EA7A0490-D20A-4C95-A944-96B51E27A741}
Linear Element Type
A Carriageway
From Distance
18 m
To Distance
87 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.027022 -0.60883
52.027134 -0.608694
52.027316 -0.608546
52.027566 -0.608356

Segment 9

2 coordinate pairs
Description
A421 northbound within the M1 J13 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
{31974257-1896-4213-8F4F-0908A31DC6EB}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
13 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.027822 -0.608172
52.027932 -0.608094

Segment 10

2 coordinate pairs
Description
A421 northbound within the M1 J13 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
{1732A629-1590-4448-855D-CF9D840A341E}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
18 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.027668 -0.608283
52.027822 -0.608172

Segment 11

2 coordinate pairs
Description
A421 northbound within the M1 J13 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
{7EF94428-BE9E-4B8E-8827-4BC4E63323ED}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
12 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.027566 -0.608356
52.027668 -0.608283

Segment 12

4 coordinate pairs
Description
A421 northbound between M1 and A428
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
{62B6D72A-00E4-4EA2-B103-8619907635AB}
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 
52.050322 -0.581845
52.050753 -0.580955
52.051686 -0.579282
52.0518 -0.579095

Segment 13

5 coordinate pairs
Description
A421 northbound between M1 and A428
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
{C5008E43-C9F0-44EE-A62C-D6A1155BC601}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
251 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.067787 -0.54993
52.068251 -0.548661
52.06859 -0.547857
52.069013 -0.546996
52.069066 -0.546908

Segment 14

7 coordinate pairs
Description
A421 northbound between M1 and A428
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
{E3CAB9AA-5048-428F-9960-EC1A984CE162}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
1,117 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.05211 -0.578586
52.053139 -0.576995
52.054178 -0.575552
52.055643 -0.573766
52.057022 -0.572299
52.058187 -0.571208
52.060339 -0.569387

Segment 15

10 coordinate pairs
Description
A421 northbound between M1 and A428
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
{E8A5E5D2-7B7E-463E-9CDC-ED111EFB4D5D}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
891 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.033556 -0.603761
52.034373 -0.602772
52.034938 -0.601889
52.035712 -0.600371
52.036237 -0.599168
52.037117 -0.596565
52.037514 -0.595492
52.037886 -0.594652
52.038382 -0.593733
52.038448 -0.593633

Segment 16

11 coordinate pairs
Description
A421 northbound between M1 and A428
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
{6723467A-5DE7-43CC-865A-B495A238965A}
Linear Element Type
A Carriageway
From Distance
0 m
To Distance
938 m
Gml Srs Name
EPSG::4326
Gml Srs Dimension
2
Raw coordinate list 
52.043562 -0.58941
52.04461 -0.58893
52.045323 -0.588542
52.045917 -0.58815
52.04661 -0.587583
52.047152 -0.587065
52.047847 -0.586237
52.048192 -0.58583
52.048671 -0.585068
52.049423 -0.5837
52.050322 -0.581845
Geometry type
MultiLineString
Geometry points
85
First coordinate pair
-0.554190, 52.067051
Road section segments
1
Road section points
85
View geometry JSON 
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View road section coordinates 
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]
Cause type
Road Maintenance
Detailed cause
Road Marking Work
Compliance
Mandatory
Probability
Certain
Validity status
Active
Road management
Carriageway Closures
Feed region label
northbound access at a minor
Feed provider
National Highways
Data source
Roadworks
Feed version
2
Record created
Sun, Sep 20, 2026 7:24 PM
Record versioned
Mon, Sep 21, 2026 12:42 AM
Coordinate source
Geometry

Driving on the A421? See every live closure, roadwork and planned restriction on this road.

A421 live closures

Related incidents

A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure

Cleared Roadworks National Highways
Bedford A421 · A421 Northbound Between A4280 And A1

Cleared 1 hour 35 minutes ago

Started 12 Oct 2026, 19:00 Ended 12 Oct 2026, 22:05

A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure

Category: Construction Work
View update

A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure

Cleared Roadworks National Highways
Bedford A421 · A421 Northbound Between A4280 And A1

Cleared 3 hours 20 minutes ago

Started 12 Oct 2026, 18:20 Ended 12 Oct 2026, 20:20

A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure

Category: Construction Work
View update

A421 eastbound M1 Jct 13 to Salford Road entry slip carriageway closure

Cleared Roadworks National Highways
Aylesbury Vale A421 · A421 Northbound Within The M1 J13 Junction

Cleared 2 days 18 hours ago

Started 9 Oct 2026, 19:00 Ended 10 Oct 2026, 05:00

A421 eastbound M1 Jct 13 to Salford Road entry slip carriageway closure

Category: Road Maintenance
View update

A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure

Cleared Roadworks National Highways
Bedford A421 · A421 Northbound Between A4280 And A1

Cleared 2 days 18 hours ago

Started 9 Oct 2026, 19:00 Ended 10 Oct 2026, 04:45

A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure

Category: Construction Work
View update

A5 both directions Little Brickhill to Thorn Roundabout short stops

Cleared Roadworks National Highways
Aylesbury Vale A5 · Roundabout At A5/B4100

Cleared 3 days 20 hours ago

Started 8 Oct 2026, 20:00 Ended 9 Oct 2026, 03:30

A5 both directions Little Brickhill to Thorn Roundabout short stops

Category: Road Maintenance
View update

A421 eastbound M1 Jct 13 to Salford Road entry slip carriageway closure

Cleared Roadworks National Highways
Aylesbury Vale A421 · A421 Northbound Within The M1 J13 Junction

Cleared 3 days 18 hours ago

Started 8 Oct 2026, 19:00 Ended 9 Oct 2026, 05:00

A421 eastbound M1 Jct 13 to Salford Road entry slip carriageway closure

Category: Road Maintenance
View update