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CrashStats

B470 accidents: crash map and statistics

Police recorded 1,303 collisions on the B470 from 1979 to 2025, with 1,663 casualties. Of those crashes, 25 were fatal and 232 serious, and 25 people were killed.

In 2025 there were 9 collisions on the B470, down 18% from 11 in 2024, with 12 casualties.

Collisions since 1979
1,303
849th highest of 4,923 roads
Casualties
1,663
1.28 per collision
Fatal collisions
25
25 people killed
Serious collisions
232
263 seriously injured
Collisions in 2025
9
Down 18% on 2024
Casualties in 2025
12
Down 8% on 2024

Crash severity on the B470

On the B470, 1.9% of collisions were fatal and 18% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal251.9%
  • Serious23218%
  • Slight1,04680%

Where the B470 ranks among 4,923 roads

Most collisions
849th
Most casualties
889th
Most fatal collisions
800th
Most serious collisions
926th

B470 accidents by year

Collisions on the B470 peaked at 52 in 1984 and were down to 9 in 2025.

Collisions and casualties on the B470, 1979 to 2025

  • Collisions
  • Collisions in 2025: 9
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025912
20241113
20231113
20222027
202189
202056
20191115
20181112
20171518
20162632
20151314
20141726
20133340
20122023
20112022
20102227
20092330
20083643
20073553
20062430
20052935
20042836
20033640
20023948
20014052
20002742
19992429
19982337
19972935
19963748
19953039
19943743
19933144
19923137
19912733
19902436
19893747
19883641
19874554
19864250
19853444
19845269
19834259
19823858
19813445
19803439
19794758

When crashes happen on the B470

Wednesday has the most collisions on the B470 (222), and 3pm to 6pm is the busiest time of day (271).

Collisions by day of the week

  • Monday185 (14%)
  • Tuesday198 (15%)
  • Wednesday222 (17%)
  • Thursday172 (13%)
  • Friday213 (16%)
  • Saturday170 (13%)
  • Sunday143 (11%)

Collisions by time of day

  • Midnight to 3am52 (4%)
  • 3am to 6am20 (1.5%)
  • 6am to 9am186 (14%)
  • 9am to noon182 (14%)
  • Noon to 3pm201 (15%)
  • 3pm to 6pm271 (21%)
  • 6pm to 9pm233 (18%)
  • 9pm to midnight158 (12%)

Collisions by month

  • January119 (9.1%)
  • February82 (6.3%)
  • March112 (8.6%)
  • April83 (6.4%)
  • May117 (9%)
  • June118 (9.1%)
  • July101 (7.8%)
  • August109 (8.4%)
  • September92 (7.1%)
  • October144 (11%)
  • November109 (8.4%)
  • December117 (9%)

Light conditions at the time

  • Daylight859 (66%)
  • Dark, street lights lit361 (28%)
  • Dark, no street lighting60 (4.6%)
  • Dark, lighting unknown16 (1.2%)
  • Dark, street lights unlit7 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B470 crashes

On the B470, 71% of collisions happened where the speed limit was 30 mph and 67% on a dry road surface.

Speed limit at the scene

  • 20 mph5 (0.4%)
  • 30 mph928 (71%)
  • 40 mph134 (10%)
  • 50 mph8 (0.6%)
  • 60 mph225 (17%)
  • 70 mph3 (0.2%)

Weather at the time

  • Fine, no high winds1,016 (78%)
  • Raining, no high winds159 (12%)
  • Raining with high winds16 (1.2%)
  • Fine with high winds13 (1%)
  • Other83 (6.4%)
  • Not recorded16 (1.2%)

Road surface

  • Dry870 (67%)
  • Wet or damp389 (30%)
  • Frost or ice26 (2%)
  • Snow5 (0.4%)
  • Other3 (0.2%)
  • Not recorded10 (0.8%)

Type of road

  • Single carriageway1,155 (89%)
  • Roundabout97 (7.4%)
  • Dual carriageway39 (3%)
  • One way street or slip road5 (0.4%)
  • Not recorded7 (0.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B470 crashes

Car occupants make up 53% of the people killed or injured on the B470, followed by motorcyclists (16%).

Casualties by road user

  • Car occupant882 (53%)
  • Motorcyclist268 (16%)
  • Pedestrian254 (15%)
  • Cyclist189 (11%)
  • Van occupant37 (2.2%)
  • Goods vehicle occupant (over 3.5 tonnes)16 (1%)
  • Other16 (1%)
  • Not recorded1 (0.1%)

Vehicles involved

  • Car1,711 (72%)
  • Motorcycle273 (11%)
  • Pedal cycle195 (8.1%)
  • Van or goods vehicle up to 3.5 tonnes96 (4%)
  • Goods vehicle over 3.5 tonnes52 (2.2%)
  • Taxi or private hire car26 (1.1%)
  • Other37 (1.5%)
  • Not recorded3 (0.1%)

Casualties by age

  • 0 to 520 (1.2%)
  • 6 to 1051 (3.1%)
  • 11 to 1582 (4.9%)
  • 16 to 20354 (21%)
  • 21 to 25222 (13%)
  • 26 to 35314 (19%)
  • 36 to 45217 (13%)
  • 46 to 55169 (10%)
  • 56 to 6594 (5.7%)
  • 66 to 7552 (3.1%)
  • Over 7540 (2.4%)
  • Not recorded48 (2.9%)

Drivers, passengers and pedestrians

  • Driver or rider1,084 (65%)
  • Passenger325 (20%)
  • Pedestrian254 (15%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B470

Map of the 25 most recent crashes on the B470

Use the arrow keys to move the map and the plus and minus keys to zoom.

  • 25 crashes
  • Serious
  • Slight

B470 crashes by council area

Collisions on the B470 were recorded in 5 council areas. Windsor and Maidenhead has the most, with 452, followed by Slough (436) and Buckinghamshire (348).

Collisions on the B470 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWindsor and Maidenhead4525661080
2ndSlough436535559
3rdBuckinghamshire348468977
4thHillingdon6385015
5thPowys3801

B470 crashes by town

Collisions on the B470 were recorded in 5 towns and built-up areas, led by Slough (426) and Datchet (188).

Recent crashes on the B470

These are the 25 most recent collisions on the B470, from 12 August 2023 to 24 October 2025.

Severity