Human & Environmental
Factors
Factors causing accidents
Human Factors Environmental Vehicle Factors
Factors
Driver behaviour/error Weather conditions Type/ condition of
Anger/ road rage Design of roadways vehicle
Drug/ alcohol use Condition of roadways Tyre defects
Fatigue Seat belts
Distractions Airbags
(passengers, radio, Crumple zones
mobile phones, Overloading
environmental)
Impairments (medical,
eyesight etc)
Medical Conditions
(heart attack, stroke,
seizure)
Human factors
Driver behaviour/ driver error
Inexperienced
Speeding: loss of control of car, stopping distances increased,
damage and injuries are much worse
Stress/rage
Eyesight
Driver has an inability to see or react to hazards in a timely
manner.
Can struggle with ‘glare’ – either on sunny days, driving at
night and driving in snow/ice
Environmental Factors
Weather conditions
Can increase stopping times
Road surface
Affect visibility
Distractions
Inexperienced drivers
Rain
Visibility
Noise
Distractions
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