FIELD: measurement technology.
SUBSTANCE: method can be used for criminal and official inquires of road accidents. Method is based upon measurement of speed of pedestrian and calculation its arithmetical mean. Method differs from known ones, as speed of motion is measured experimentally 10 to 30 times with three different pedestrians having like age and physical condition as victim of run-over. Results are processed as small sample by using central deviations and those deviations are used to determine average meaning of speed of motion, standard deviation, error and truth of the average mean. Upon finding truth of average mean the necessary number of trials is calculated which number has to be compared with real number of trials. Additional trials are conducted if necessary. Factor of truth of experimental data is calculated from speeds of motion of pedestrians taking part in experiment. Probability and factor of confidence is determined accordingly to speed of motion of injured person and speeds of motion of pedestrians involved into experiment, as well as according to truth of preset limit values of this parameter. If values of preset factors correspond to legitimate values or limits admitted for investigation of road accidents, statistically true minimal and maximal values of speed of motion of injured pedestrian are calculated on the base of normal distribution law by means of subtraction the speed from its average value and addition of product of factor of confidence with standard deviation. Limit values of speed of motion of injured pedestrian are presented for forensic examination to make calculations determining availability or lack of availability of prevention of run-over. For this purpose the statistically truthful minimal and maximal values of speed of motion of injured pedestrian should be calculated in relation to accessible values or limits of probability which is higher than 0,95 and if confidence with speed of motion of injured pedestrian and pedestrians involved into experiment correspond to each other. Preset precision of pedestrian's speed of motion should be within limits of +-0,5 km/hour.
EFFECT: improved precision of measurement; higher probability of prevention of road accident.
2cl, 2 tbl
