This thesis analyzes the efficiency of passenger transportation on the following inter-county bus routes: Zagreb – Rijeka, Zagreb – Šibenik, Zagreb – Osijek, and Rijeka – Zagreb, Šibenik – Zagreb, Osijek – Zagreb. Passengers are described in the capacity of transportation substratum as well as technological elements of the respective inter-county routes. The analysis of transportation demand on the aforementioned inter-county routes has been conducted on the basis of data collected by transportation companies. Four in detail analyzed fluxes have been presented (realized transportation efficiency, indicators and time, space and capacity efficiency coefficients). The above is followed by a description of the characteristics of the respective bus terminals which are the start and end point of the bus routes in question. The main technical characteristics of the used vehicles have also been presented. Finally, a comparative analysis of the transportation processes has been conducted whereby the performance evaluation of the analyzed lines has been obtained on the basis of several different criteria. The comparative analysis has also led to the conclusion on the advantages and disadvantages of the analysed routes.