The analysis of huge rows of traffic data collected loop detectors we can get a lot of information about the traffic conditions of different highway sections. These equipments are able to measure the vehicle speed, following time and of course the traffic volume in different vehicle types. Such a measurement types are the best to choose those sections where catch the maximum value of vehicle traffic. Comparing our regulations to the HCM two basic differences can be noticed. Instead of A - E HCM LOS only two levels are used in Hungarian regulations. The tolerable (F_m) is the design level. The eligible (F_e) is the so called intervention level (when the capacity can only be risen with an intervention). The eligible capacity (2000 pcph) is significantly lower than the capacity of HCM (3200 pcph) recommendation. On the base of our results can be recommended to use the 3200 pcph HCM 2000 recommendation as the possible traffic volume also in Hungary. By these about 30% higher capacity values the network development can be planned more rational.