By the analysis of the traffic data collected loop detectors we can get information about the capacities of different freeway sections.The results and the analysis of the measurements able to show the real maximum traffic volume:2300-2400 pcphpl.According to the recent regulations the maximum tolerable traffic volumes are much lower than these and lower than 2200 (capacity in HCM).We recommend using the HCM capacity values and the HCM Level of Services (LOS) categories in Hungary.By these 20% higher capacity value are more rational from the point of view of the national economy.Keywords traffic data analysis · highway capacity · level of services Acknowledgement This work is connected to the scientific program of the "Development of quality-oriented and harmonized R+D+I strategy and functional model at BME" project.
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. Keywords traffic data analysis · two-lane highway capacity · A-F level of services AcknowledgementThis work is connected to the scientific program of the " Development of quality-oriented and harmonized R+D+I strategy and functional model at BME" project. This project is supported by the New Széchenyi Plan (Project ID: TÁMOP-4.2.1/B-09/1/KMR-2010-0002).Special thanks to Péter Bocz and Gabriella Devecseri for their help in the completion of measurements.
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