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Severe Blackspot · 3,002 combined incidents · 39 fatal · Showing full road data
Ranked 7 of 737 UK roads with 100+ recorded collisions by recorded harm.
A ranking of our own records, not a risk-per-vehicle measure and not an official safety assessment. Collisions are weighted by outcome: one fatal counts for 50 slight collisions, one serious for 8.
📍 Each pin marks an actual police-recorded collision location · Zoom in and click for details
A4 ranks 7 of 737 UK roads with 100+ recorded collisions — worse than 99% of them by recorded harm. Of the 3,001 collisions on record, 39 fatal and 529 serious.
Is there a pattern in time?
Conditions recorded by police at the scene — most commonly fine no high winds
Showing the 50 most recent of 3,001 DfT STATS19 police-recorded collisions on the A4. Tap a row for its conditions. Open shows the full police record – vehicles, drivers, casualties – for 1 credit (slight), 2 (serious) or 3 (fatal); records you have opened say so.
The A4 road safety report – every collision, severity split, conditions and junction ranking, to print or file – comes with the Road Pass.
See the road safety report →Data Sources: DfT STATS19 police-recorded collision data and National Highways incident data, both under Open Government Licence v3.0. This is historical DfT statistical data — not an official police report. Blackspot classification is algorithmic and not an official safety assessment. © 2026 UK Traffic Updates.