Table S: Contributory factors: Casualties in reported collisions - seriously injured 1, 2022

Table S: Contributory factors: Casualties in reported collisions - seriously injured 1, 2022

Person who was seriously injured as a % of all seriously injured casualties
Pedestrian pedalcyclist motorcyclist Car/taxi user Other All
Road environment contributed
Poor or defective road surface 4 2 8 6 0 20 1
Deposit on road (eg oil, mud, chippings) 0 0 18 4 0 22 1
Slippery road (due to weather) 7 3 11 91 5 117 7
Inadequate/masked signs or road markings 3 0 2 6 0 11 1
Defective traffic signals 0 0 0 1 0 1 0
Traffic calming (eg road humps, chicanes 1 0 0 0 0 1 0
Temporary road layout (eg contraflow) 1 2 1 5 0 9 1
Road layout (eg bend, hill, narrow c-way 2 4 4 18 2 30 2
Animal or other object in carriageway 2 1 4 15 1 23 1
Sunken,raised or slippery inspection cov 0 0 1 0 0 1 0
Vehicle defects
Tyres illegal, defective or under-inflated 3 1 2 15 1 22 1
Defective lights or indicators 0 0 0 1 1 2 0
Defective brakes 1 2 0 1 0 4 0
Defective steering or suspension 0 0 0 2 0 2 0
Overloaded or poorly loaded vehicle/trai 0 0 0 0 3 3 0
Injudicious action (driver/rider)
Disobeyed automatic traffic signal 1 2 0 15 2 20 1
Disobeyed Give Way or Stop sign or markings 0 10 9 25 7 51 3
Disobeyed double white line 0 0 0 6 0 6 0
Disobeyed pedestrian crossing facility 6 0 1 0 0 7 0
Illegal turn or direction of travel 0 0 2 15 1 18 1
Exceeding speed limit 9 0 15 71 5 100 6
Travelling too fast for the conditions 7 1 21 88 2 119 8
Following too close 0 1 8 25 2 36 2
Vehicle travelling along pavement 0 1 0 0 0 1 0
Cyclist entering road from pavement 0 7 0 0 1 8 1
Driver/rider error or reaction
Junction overshoot 1 2 0 15 2 20 1
Junction restart 0 0 2 3 1 6 0
Poor turn or manoeuvre 8 13 40 56 11 128 8
Failed to signal / misleading signal 1 5 1 1 4 12 1
Failed to look properly (D/R) 68 75 68 152 25 388 25
Failed to judge other pers path/speed (D/R) 3 22 43 95 12 175 11
Too close to cyclist,horse or pedestrian 4 9 2 0 0 15 1
Sudden braking 0 0 9 21 1 31 2
Swerved 1 2 7 34 6 50 3
Loss of control 9 5 48 186 22 270 17
Impairment or distraction (driver/rider)
Impaired by alcohol (D/R) 5 1 10 72 3 91 6
Impaired by drugs (illicit/medicinal) (D/R) 12 1 1 34 5 53 3
Fatigue 1 0 0 28 7 36 2
Uncorrected defective eyesight 0 0 0 3 0 3 0
Illness or disability (mental/physic) (D/R) 2 0 3 45 3 53 3
Not display lights at night / in poor visibility 0 2 1 1 1 5 0
Cyclist wearing dark clothing at night 0 4 0 0 1 5 0
Driver using mobile phone 0 0 0 1 0 1 0
Distraction in vehicle 2 0 0 26 1 29 2
Distraction outside vehicle 0 0 1 6 2 9 1
Behaviour or inexperience (driver/rider)
Aggressive driving 7 1 9 19 4 40 3
Careless / reckless /in a hurry (D/R) 23 14 40 147 14 238 15
Nervous / uncertain / panic 1 0 1 9 0 11 1
Driving too slow for condits / slow vehicle 0 0 0 1 1 2 0
Inexperienced or learner driver/rider 2 0 10 33 3 48 3
Inexperience of driving on the left 0 0 3 16 2 21 1
Inexperience with type of vehicle 2 0 0 9 1 12 1
Vision affected
Stationary or parked vehicle 6 2 1 6 0 15 1
Vegetation 0 1 0 0 0 1 0
Road layout (eg bend, winding rd, hill crest 1 2 1 7 0 11 1
Buildings, road signs, street furniture 0 2 0 0 0 2 0
Dazzling headlights 2 0 0 1 0 3 0
Dazzling sun 5 6 3 24 2 40 3
Rain, sleet, snow or fog 8 2 1 12 0 23 1
Spray from other vehicles 0 0 0 2 0 2 0
Visor/windscreen dirty/scratched/frosted 3 0 0 0 1 4 0
Vehicle blind spot 2 0 0 4 0 6 0
Pedestrian only
Crossed road masked by stationary/parked 28 0 0 0 0 28 2
Pedestrian failed to look properly 109 4 0 6 0 119 8
Ped. failed to judge vehicles path or sp 32 2 0 0 0 34 2
Wrong use of pedestrian crossing facilit 15 0 1 0 0 16 1
Dangerous action in carriageway (e.g. playing in road) 13 0 0 0 0 13 1
Pedestrian impaired by alcohol 29 0 0 1 0 30 2
Ped. impaired by drugs (illicit/medicinal 7 0 0 1 0 8 1
Ped. careless / reckless /in a hurry 45 0 3 8 3 59 4
Pedestrian wearing dark clothing at night 21 0 0 0 0 21 1
Ped. disability or illness, mental/physical 7 0 0 5 0 12 1
Special codes
Stolen vehicle 1 0 2 5 0 8 1
Vehicle in course of crime 4 0 1 5 1 11 1
Emergency vehicle on call 0 0 0 3 0 3 0
Vehicle door opened or closed negligently 0 1 0 1 0 2 0
All serious injuries 312 136 251 760 106 1,565 100%

1. Includes only collisions where a police officer attended the scene and in which a contributory factor was reported.

NB: As described in the text, an collision will be counted once for each combination of CF (excluding "repeats") and serious injury. For example, an collision with four different CFs and three serious injury would be counted twelve times in this table - each serious injury would be counted against the first CF, then against the second CF, and so on. As a result, the percentages would total far more than 100%. However, "repeats" are excluded: if the same CF applies to two different participants, each serious injury will be counted only once against that CF.

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