The speed of motor vehicles is universally agreed to be the most important factor contributing to crash, injuries and fatalities on roads. Speed influences both crash risk and crash consequence.
Excess speed refers to a vehicle exceeding the prescribed speed limit and inappropriate speed refers to a vehicle traveling at a speed unsuitable for the prevailing road and traffic conditions.
Modern cars fitted with more efficient engines have very high acceleration and can achieve high speeds within a very short time and distance. Crash risk increases as speed increases especially at road junctions and while overtaking - as road users underestimate this speed and overestimate the distance of an approaching vehicle.
Further, in developing countries with a mixed traffic and high volume of vulnerable road users, increased speed has significantly contributed to an increasing trend of fatalities on Indian roads.
Empirical evidence from speed studies has shown that an increase of one KM per hour in mean traffic speed typically results in a 3% increase in the incidence of injury crashes or an increase of 4% to 5% for fatal crashes.
Speed has an exponentially detrimental effect on safety. As speed increase so do the number and severity of injuries. Studies show that the higher the impact speed the greater the likelihood of serious and fatal injuries.
Older pedestrians are even more physically vulnerable as speed increases.
SPEEDING CAN BE A CAUSE OF SEVERE CRASH