Problems of reliability and exactitude of traffic surveys' data

The paper dealt with the important problems of exactitude and reliability of composite traffic parameters. To collect traffic data, the representative sampling method is applied actually in traffic surveys in Hungary. Nearly all parameters characterising the traffic are determined as products of different components. Depending upon the methodology applied in the survey, each component has its own exactitude and reliability, An appropriate methodology is presented allowing to calculate for all traffic parameters the error of the estimation and the weight attributed to it, being proportional to reliability.