Abstract
There is little known on the use of safety systems on the rear seats of cars. The presented data in this report must be seen as an indication The percentage of safety systems present on rear seats was between 5 and 11 during the last years. It the use of safety systems on rear seats should be legally introduced, the maxim effect will be reached after 10 years. From the mathematical model is estimated that there will be 30-35 traffic fatalities less per year.