Closure
A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure
from 20:00
Tonight
🚨 Live A421 Incidents & Roadworks
Auto-refresh 3 minSpotted something on the A421?
Warn other drivers in real time — thousands check these pages every day
💥 Crash⚠️ Hazard⛔ Closure🐌 Queue
🗺️ A421 Traffic Map — Where It's Happening
Tap a pin for full incident detail. Live positions from National Highways.
⚠️ Most Dangerous A421 Junctions
Based on DfT STATS19 police collision records. The A421 has 407 recorded collisions at 6 collision hotspots, involving 592 casualties (7 fatal). Take extra care here.
#1
Severe Blackspot
nr Milton Keynes
137 collisions · 188 casualties · 2 fatal · 25 serious
#2
Severe Blackspot
nr Marston Moretaine
118 collisions · 179 casualties · 2 fatal · 20 serious
#3
Severe Blackspot
nr Buckingham
37 collisions · 61 casualties · 2 fatal · 8 serious
#4
Severe Blackspot
nr Sandy
24 collisions · 42 casualties · 1 fatal · 5 serious
#5
Severe Blackspot
nr Bedford
82 collisions · 111 casualties · 15 serious
#6
Blackspot
nr Brackley
9 collisions · 11 casualties · 5 serious
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❓ A421 Traffic — Frequently Asked Questions
Q: Is the A421 closed today?
Any A421 closure appears in the live feed above within minutes of National Highways reporting it, including tonight's overnight roadworks closures.
Q: Is there traffic on the A421 today?
The live feed above shows every incident, delay, roadwork and overnight closure on the A421, updated every 5 minutes from National Highways.
Q: What is the worst time to use the A421?
The A421 is typically busiest during morning rush hour (07:00–09:00) and evening rush hour (17:00–19:00) on weekdays.
Q: Are there roadworks on the A421 right now?
Roadworks and overnight closures on the A421 are listed above and at /traffic/a421/roadworks/, taken from the National Highways daily closure report.
Q: What roads connect to the A421?
The A421 connects to: M1, A6, A428.
📊 A421 Status Summary
0
Active incidents
0
Severe/serious
0
Roadworks
06:35
Last updated
🆘 Broken down on the A421?
One free request reaches local recovery firms
ℹ️ A421 Road Details
- Length
- 25 miles
- From
- Milton Keynes (M1 J13)
- To
- Bedford (A6)
- Type
- A-road
- AM Rush
- 07:00–09:00
- PM Rush
- 17:00–19:00
📍 Key A421 Locations
Milton Keynes
Bedford
🔗 Roads Connecting to the A421
🛣️ A421 Services & Motorway Stops
No services directly on the A421. Browse all services →
🔗 Related Tools
📱 Follow A421 Updates
Daily A421 incidents, posted across all four channels.
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