The problem is all the more acute because the victims are overwhelmingly healthy before their crashes.According to the World Health Organization (WHO), more than 1 million people are killed on the world's roads each year.Best-practices in modern road safety strategy: The basic strategy of a Safe System approach is to ensure that in the event of a crash, the impact energies remain below the threshold likely to produce either death or serious injury.
Traffic accident data are often compared between countries and between regions.
These comparisons are done in numbers of casualties, but also in relation to the number of inhabitants (a measure of national health risk), the number of vehicle kilometres driven (a measure of the transport risk) as well as the number of cars in a country, etc.
For example, the elimination of head-on KSI crashes simply required the installation of an appropriate median crash barrier.
Also, roundabouts, often with speed reducing approaches, encounter very few KSI crashes.
The third level is about reducing the crash risk which involves applying the road design standards and guidelines (such as from AASHTO), improving driver behavior and enforcement. 1920; but so said the original caption, guard rails were only sometimes effective at the time.
It was not until the 1960s that safety testing ensured adequate protection, and even then only for vehicles of a limited weight class Road traffic crashes are one of the world's largest public health and injury prevention problems.For example, in 2013, German autobahns carried 31% of motorized road traffic (in travel-kilometres) while accounting for 13% of Germany's traffic deaths.The autobahn fatality rate of 1.9 deaths per billion-travel-kilometres compared favorably with the 4.7 rate on urban streets and 6.6 rate on rural roads.Such interventions explore the configurations of a network that will inherently reduce the probability of collisions.Interventions for the prevention of road traffic injuries are often evaluated; the Cochrane Library has published a wide variety of reviews of interventions for the prevention of road traffic injuries.replace KSI rates with crash rates – for example, crashes per million vehicle miles.Vehicle speed within the human tolerances for avoiding serious injury and death is a key goal of modern road design because impact speed affects the severity of injury to both occupants and pedestrians.Interventions may seek to reduce or compensate for these factors, or reduce the severity of crashes.A comprehensive outline of interventions areas can be seen in management systems for road safety.The old road safety paradigm of purely crash risk is a far more complex matter.Contributing factors to highway crashes may be related to the driver (such as driver error, illness, or fatigue), the vehicle (brake, steering, or throttle failures), or the road itself (lack of sight distance, poor roadside clear zones, etc.).