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M4 J23A at 09:41 on Monday 12 October: 1 nearby.
Straight from National Highways, re-checked every 3 minutes while this page is open.
Location from the National Highways junction reference.
Wider area: counting every road within 3 miles — local streets, A-roads, everything — 83 collisions are on record, 6 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 M4 itself, within 2 miles of J23A. 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 M4 J23A → 41 of 49 junctions on the M4 · see where it ranks nationallyM4 J23A is at Magor & Llanwern. National Highways signs it as Magor South.
Not at M4 J23A itself as of 09:41. Nearby, National Highways report: The M4 eastbound between junctions J22 and J19. Congestion. Normal traffic conditions are expected between 10:00 and 10:15 on 12 October 2026. There are currently delays between 1 and a half hours an… (2 junctions away).
No closure is listed at M4 J23A as of 09:41.
Police STATS19 records show 17 collisions on the M4 within 2 miles of J23A, including 0 fatal and 4 serious. Counting every road in the area, 83 collisions are recorded within 3 miles. That ranks it 473 of 554 UK junctions we hold collision records for.
Live incidents, roadworks and delays for the whole M4, updated every 5 minutes from National Highways.
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