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4Junction

A1(M) Junction 4 Traffic

Hatfield & Welwyn Garden City · Hatfield North · near Hatfield

🏰 The junction for Hatfield House

A1(M) J4 at 14:17 on Tuesday 3 November: closure planned from 22:00.

Home › Traffic › Roads › A1(M) › Junction 4

🚨 Live at A1(M) J4 right now

Checked 14:17 · auto-refresh
✅Nothing reported at A1(M) J4 right now.
Planned closures at A1(M) J4
🌙 Planned from 22:00 until 05:30 Wed 4 Nov
A1M Northbound Jct 3 to Jct 4 carriageway and slip road closure
↑ NorthboundCarriageway closed
Diversion: Diversion via Local Authorities roads
🌙 Planned from 22:00 until 05:30 Wed 4 Nov
A1M Southbound Jct 4 to Jct 2 Carriageway and slip road closure
↓ SouthboundCarriageway closed
Diversion: Diversion via Local Authorities Network

Straight from National Highways, re-checked every 3 minutes while this page is open.

All live A1(M) traffic →A1(M) northbound →A1(M) southbound →A1(M) roadworks →

Is A1(M) junction 4 closed? Quick answers

Checked 14:17 on Tuesday 3 November 2026.

Is A1(M) junction 4 closed right now?

No. Nothing is closing the road at A1(M) junction 4 at 14:17.

Is A1(M) junction 4 closed tonight?

Yes. A1(M) junction 4 has 2 full closures planned tonight (Tue 3 Nov, 18:00 to 06:00): A1M Northbound Jct 3 to Jct 4 carriageway and slip road closure, 22:00 to 05:30; and A1M Southbound Jct 4 to Jct 2 Carriageway and slip road closure, 22:00 to 05:30. Diversion: Diversion via Local Authorities roads.

Tonight: every A1(M) closure ›

Is A1(M) junction 4 closed this weekend?

Yes. A1(M) junction 4 has 2 full closures planned this weekend (Fri 6 Nov 18:00 to Mon 9 Nov 06:00): A1M Northbound Jct 3 to Jct 4 carriageway and slip road closure, Fri 22:00 to 05:30; and A1M Southbound Jct 4 to Jct 2 Carriageway and slip road closure, Fri 23:00 to 05:30. Diversion: Diversion via Local Authorities roads.

This weekend: every A1(M) closure ›

Is there an accident at A1(M) junction 4 today?

No. No collision has been reported at A1(M) junction 4 since midnight.

A1(M) accidents today and yesterday ›

Answers use official data only: the National Highways live incident feed and their planned closure report. A closure is counted here when National Highways name this junction or a stretch that runs through it.

🗺️ Where A1(M) J4 is

Location from the National Highways junction reference. Nearest towns: Hatfield, Welwyn Garden City, South Mimms, Welwyn.

📍 Heading to… from A1(M) J4

Places and the junctions they are reached from are kept by our team; distances are measured in a straight line from the junction, not along the road.

⚠️ Collision record on the A1(M) at J4

101Collisions
1Fatal
21Serious
161Casualties
69
Around the middle
Ranked 172 of 556 UK junctions on record · 5 of 19 on the A1(M)

Wider area: counting every road within 3 miles — local streets, A-roads, everything — 1,502 collisions are on record, 21 of them fatal. That figure follows how built-up the area is, so it is shown for context and is not what the ranking uses.

Department for Transport STATS19 police collision records on the A1(M) itself, within 2 miles of J4. This is the free summary — the full breakdown by severity, weather, road surface, time of day and individual record is in the blackspot report.

📊 Full collision analysis for A1(M) J4 → 5 of 19 junctions on the A1(M) · see where it ranks nationally

❓ A1(M) J4 — Frequently Asked Questions

Where is A1(M) junction 4?

A1(M) J4 is at Hatfield & Welwyn Garden City. National Highways signs it as Hatfield North. The nearest town is Hatfield.

Is there an accident at A1(M) J4?

No — as of 14:17 National Highways list nothing at A1(M) J4. This page re-checks their live feed every few minutes, 24 hours a day.

Is A1(M) junction 4 closed?

Not right now. Planned: A1M Northbound Jct 3 to Jct 4 carriageway and slip road closure, from 22:00 until 05:30 Wed 4 Nov.

How many accidents happen at A1(M) junction 4?

Police STATS19 records show 101 collisions on the A1(M) within 2 miles of J4, including 1 fatal and 21 serious. Counting every road in the area, 1,502 collisions are recorded within 3 miles. That ranks it 172 of 556 UK junctions we hold collision records for.

Which places is A1(M) junction 4 the junction for?

A1(M) J4 is the junction for Hatfield House (heritage, Hatfield), about 0.5 miles in a straight line - reached from A1(M) J4.

What is near A1(M) junction 4?

Within 15 miles of A1(M) J4: St Albans Cathedral (heritage, St Albans), about 5.5 miles west in a straight line; Hertfordshire Zoo (zoo & wildlife, Broxbourne), about 6.5 miles east in a straight line; Knebworth House (events venue, Knebworth), about 7.5 miles north in a straight line; Warner Bros. Studio Tour London (attraction, Leavesden), about 10 miles south-west in a straight line; London Luton Airport (airport, Luton), about 10 miles north-west in a straight line; Vicarage Road (stadium, Watford), about 11 miles south-west in a straight line.

🚨 Live A1(M) traffic

Live incidents, roadworks and delays for the whole A1(M), updated every 5 minutes from National Highways.

🚗 A1(M) live traffic →

↔️ Next junctions

← J3
Hatfield & Welham Green J5
Welwyn & Digswell →

📍 Towns near this junction

Hatfield 0.7 mi Welwyn Garden City 2.8 mi South Mimms 4.8 mi Welwyn 4.8 mi

🔢 All A1(M) junctions

J1 J2 J3 J4 J5 J6 J7 J8 J9 J10 J56 J57 J58 J59 J60 J61 J62 J63 J65

🆘 Broken down near A1(M) J4?

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