On behalf of the Swedish Institute for Transport and Communications Analysis

(SIKA) the effect on traffic safety has been estimated regarding a complete

observance of the laws concerning existing speed limits, the use of seat belt

and to be sober as a car driver. A very high observance of the three laws

means at least half the number of fatalities in traffic. Interesting is that

the observance of law is not randomly distributed on the three measures. Both

drivers who observe all three laws and drivers who do not observe any of the

laws are overrepresented in traffic.