Road crashes causing death, injury, and damage have always happened since the times when roads got overtly populated with automobiles. There exits numerous reasons for such accidents. The first and the foremost being the consumption of wine and drugs. It has being scientifically tested that the reaction time delay causes such collisions.
If drivers perceive a location as hazardous, they take more care and there are no accidents. Accidents happen when hazardous road or traffic conditions are not obvious at a glance, or where the conditions are too complicated for the limited human machine to perceive and react in the time and distance available.
However, there exists other reasons which contributes in a road collision, enlisted as under:
1) Poor eyesight or physical impairment, with many jurisdictions setting simple sight tests and/or requiring appropriate vehicle modifications before being allowed to drive.
2)Old age, with some jurisdictions requiring driver retesting for reaction speed and eyesight after a certain age.
4)Excessive alcohol: Can be tested with simple blood-alcohol limits enforced through drink-driving laws (although some level of impairment may occur below the legal limit).