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CrashStats

B4518 accidents: crash map and statistics

Police recorded 221 collisions on the B4518 from 1979 to 2025, with 309 casualties. Of those crashes, 7 were fatal and 82 serious, and 11 people were killed.

In 2025 there were 5 collisions on the B4518, level with 2024, with 5 casualties.

Collisions since 1979
221
3,113th highest of 4,923 roads
Casualties
309
1.40 per collision
Fatal collisions
7
11 people killed
Serious collisions
82
100 seriously injured
Collisions in 2025
5
Level with 2024
Casualties in 2025
5
Down 29% on 2024

Crash severity on the B4518

On the B4518, 3.2% of collisions were fatal and 37% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal73.2%
  • Serious8237%
  • Slight13260%

Where the B4518 ranks among 4,923 roads

Most collisions
3,113th
Most casualties
3,085th
Most fatal collisions
2,103rd
Most serious collisions
2,236th

B4518 accidents by year

Collisions on the B4518 peaked at 10 in 1984 and were down to 5 in 2025.

Collisions and casualties on the B4518, 1979 to 2025

  • Collisions
  • Collisions in 2025: 5
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202555
202457
2023911
202233
202155
202033
201966
201835
201779
201668
201533
201434
201345
201266
2011711
201066
200912
200823
200778
200679
200545
200456
200334
2002811
200168
2000610
199923
199869
199735
199647
199538
199435
199346
199211
199136
199011
198912
1988811
198746
198655
198579
19841015
198334
1982716
198137
1980815
197955

When crashes happen on the B4518

Friday has the most collisions on the B4518 (38), and 3pm to 6pm is the busiest time of day (50).

Collisions by day of the week

  • Monday36 (16%)
  • Tuesday26 (12%)
  • Wednesday30 (14%)
  • Thursday20 (9%)
  • Friday38 (17%)
  • Saturday38 (17%)
  • Sunday33 (15%)

Collisions by time of day

  • Midnight to 3am11 (5%)
  • 3am to 6am3 (1.4%)
  • 6am to 9am18 (8.1%)
  • 9am to noon41 (19%)
  • Noon to 3pm43 (19%)
  • 3pm to 6pm50 (23%)
  • 6pm to 9pm34 (15%)
  • 9pm to midnight21 (9.5%)

Collisions by month

  • January20 (9%)
  • February17 (7.7%)
  • March13 (5.9%)
  • April11 (5%)
  • May24 (11%)
  • June23 (10%)
  • July21 (9.5%)
  • August21 (9.5%)
  • September19 (8.6%)
  • October13 (5.9%)
  • November23 (10%)
  • December16 (7.2%)

Light conditions at the time

  • Daylight165 (75%)
  • Dark, no street lighting41 (19%)
  • Dark, street lights lit11 (5%)
  • Dark, lighting unknown2 (0.9%)
  • Dark, street lights unlit2 (0.9%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4518 crashes

On the B4518, 72% of collisions happened where the speed limit was 60 mph and 54% on a dry road surface.

Speed limit at the scene

  • 20 mph4 (1.8%)
  • 30 mph55 (25%)
  • 40 mph2 (0.9%)
  • 60 mph160 (72%)

Weather at the time

  • Fine, no high winds160 (72%)
  • Raining, no high winds32 (14%)
  • Raining with high winds10 (4.5%)
  • Fine with high winds4 (1.8%)
  • Other13 (5.9%)
  • Not recorded2 (0.9%)

Road surface

  • Dry119 (54%)
  • Wet or damp88 (40%)
  • Frost or ice9 (4.1%)
  • Snow4 (1.8%)
  • Flood over 3cm deep1 (0.5%)

Type of road

  • Single carriageway210 (95%)
  • Roundabout6 (2.7%)
  • One way street or slip road2 (0.9%)
  • Dual carriageway1 (0.5%)
  • Not recorded2 (0.9%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4518 crashes

Car occupants make up 64% of the people killed or injured on the B4518, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant198 (64%)
  • Motorcyclist44 (14%)
  • Pedestrian25 (8.1%)
  • Cyclist19 (6.1%)
  • Van occupant10 (3.2%)
  • Other vehicle occupant5 (1.6%)
  • Minibus occupant4 (1.3%)
  • Other4 (1.3%)

Vehicles involved

  • Car246 (69%)
  • Motorcycle45 (13%)
  • Pedal cycle19 (5.3%)
  • Van or goods vehicle up to 3.5 tonnes19 (5.3%)
  • Goods vehicle over 3.5 tonnes12 (3.4%)
  • Other vehicle9 (2.5%)
  • Agricultural vehicle2 (0.6%)
  • Other6 (1.7%)

Casualties by age

  • 0 to 511 (3.6%)
  • 6 to 109 (2.9%)
  • 11 to 1510 (3.2%)
  • 16 to 2056 (18%)
  • 21 to 2543 (14%)
  • 26 to 3553 (17%)
  • 36 to 4531 (10%)
  • 46 to 5534 (11%)
  • 56 to 6531 (10%)
  • 66 to 7517 (5.5%)
  • Over 7514 (4.5%)

Drivers, passengers and pedestrians

  • Driver or rider203 (66%)
  • Passenger81 (26%)
  • Pedestrian25 (8.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4518

Map of the 25 most recent crashes on the B4518

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

  • 25 crashes
  • Serious
  • Slight

B4518 crashes by council area

All 221 collisions on the B4518 were in Powys.

Collisions on the B4518 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stPowys221309782

B4518 crashes by town

Of the 221 collisions on the B4518, 39 were in the built-up area of Llanidloes.

Recent crashes on the B4518

These are the 25 most recent collisions on the B4518, from 24 May 2021 to 14 December 2025.

Severity