ENThe changes after Lithuania joined the EU and customs union are analyzed here. For the transportflows forecast and the analysis of traffic at the border theories of multidimensional regression, correlation analysis and wholesale service flows are applied here, the statistical data is processed. According to these mathemati-cal theories and methods a transport flow which will cross the outer border of the EU is forecasted. The methodhow to predict the amount of transport at a certain border is shown here. The research is performed to find outwhich custom links have problems. Conclusions and few suggestions how to quicken road traffic flows through Lithuanian customs are also presented in this work. Keywords: road traffic flows, the theories of multidimensional regression, correlation analysis, wholesale serviceflows, forecast. [From the publication]