The possibility of the evaluation of the full vector of vehicle speed (automobile) as the result of the radiolocation image processing, obtained by the radar of automobile collision prevention (AR), is considered. In the report is suggested to use the cross-correlation function (CCF) for successive frames, formed by the moving AR, to form the speed estimations. The results of forming and analysis of the MCF between successive (by the time of their forming) radiolocation frames are presented in the report. CCF parameters (its maximum, width and modality) are analyzed. The conclusion is made about the possibility of this function usage as the instrument for the automobile full speed vector estimation. The results for the estimation of range of working speeds and potential accuracy in automobile speed vector measurement are presented.