Find traffic updates, service providers, tools & more
A1(M) J4 at 08:50 on Monday 12 October: part closure planned from 22:00.
Straight from National Highways, re-checked every 3 minutes while this page is open.
Location from the National Highways junction reference. Nearest towns: Hatfield, Welwyn Garden City, South Mimms, Welwyn.
Wider area: counting every road within 3 miles — local streets, A-roads, everything — 728 collisions are on record, 13 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 → 4 of 19 junctions on the A1(M) · see where it ranks nationallyA1(M) J4 is at Hatfield & Welwyn Garden City. National Highways signs it as Hatfield North. The nearest town is Hatfield.
No — as of 08:50 National Highways list nothing at A1(M) J4. This page re-checks their live feed every few minutes, 24 hours a day.
Not right now. Planned: A1(M) Southbound Jct 4 Exit Slip Road Closure, from 22:00 until 05:30 Tue 13 Oct.
Police STATS19 records show 47 collisions on the A1(M) within 2 miles of J4, including 1 fatal and 13 serious. Counting every road in the area, 728 collisions are recorded within 3 miles. That ranks it 141 of 554 UK junctions we hold collision records for.
Live incidents, roadworks and delays for the whole A1(M), updated every 5 minutes from National Highways.
🚗 A1(M) live traffic →