Answer:
stopping distance = thinking distance + braking distance
Condition of the car : if the condition is bad it will increase the stopping distance as if the car brakes or tyres are in poor condition the braking distance will increase
Condition of the driver : if he is on drug or alcohol or he is tires or he has distractions then ( basically in bad condition ) . The stopping distance will increase as thinking distance will increase .
Weather : if it is snowing or there is bad weather conditions then stopping distance will increase as braking distance will increase
Road surface : bad conditions( broken or dust) will increase braking distance so therefore the stopping distance will increase