The effect of the driver and construction changes in vehicle suspension systems on the ability to perform sudden manoeuvres on the road on the basis of tests carried out on police cars

Police cars are very often driven as priority vehicles, reaching high speed in the open road traffic. That is why the parameters related to vehicle stability and steerability should be very high. This paper is an attempt to answer the question to what extent a typical driver can feel, and what is more important – take advantage of technical changes in the chassis in order to increase the speed in the performance of a test, or to enhance the safety of the drive. In this paper the authors attempt to assess to what extent the results of measurements of vehicle dynamics are affected by the driver and to what extent by particular technical solutions. The work was carried out under research and development project no. OR00000911 "Determination of the technical requirements and the equipment necessary in police cars on the basis of tests on model demonstrators" and previous results obtained in tests carried out in the Military Institute of Armored and Automotive Technology (WITPiS).The tests were carried out on the basis of a KIA CEED, currently one of the models most frequently used by the Police.