Live from National Highways

A421 Roadworks

Lane closures, overnight works and planned schemes on the A421, straight from the National Highways feed.

0Running now

0Severe delay

1Starting soon

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Severe Eastbound Starting soon 🌙 tonight

A421 eastbound Water End Interchange to Black Cat Roundabout carriageway closure

Overall Scheme Details: A1 / A421 both directions Biggleswade to St Neots - carriageway closures, lane closures, narrow lanes, permanent layby closures and

Diversion: diversion routes for construction - bypass/new on behalf of National Highways

✅ until 06:00 Tue 13 Oct

❓ A421 roadworks — Frequently Asked Questions

Are there roadworks on the A421 right now?

No roadworks are currently running on the A421 according to National Highways.

Is the A421 closed tonight?

1 closure is scheduled on the A421 in the next 72 hours. Each one is listed above with its window and diversion.

When are A421 roadworks usually carried out?

Most National Highways lane closures on the A421 run overnight and are lifted before the morning peak (07:00–09:00). Full carriageway closures are usually weekend nights, with a signed diversion.

🛣️ Data from National Highways · All UK roadworks · Overnight closures · A421 live traffic
Roadworks change at short notice. Always follow signs and signals on the road.

🚗 A421 pages

A421 live traffic →

A421 Trunk Road · 25 miles. Live incidents, junction status and collision history.

🚧 Roadworks elsewhere

🇬🇧 All UK roadworks → 🌙 Tonight's overnight closures → 🚧 M1 roadworks → 🚧 A6 roadworks → 🚧 A428 roadworks →

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