Calculation of capacity and level of service of signal intersections in the city of Rijeka : Potok area

Prometni tok urbanih cestovnih prometnica spada u prekidni prometni tok, što znači da se povremeno prekida na način da se uređuju raskrižja, kako bi sva vozila koja se žele koristiti tim dijelom prometnice dobila svoje pravo prolaska. Na signalnim raskrižjima potrebno je napraviti vrlo kvalitetne signalne planove prema uvjetima prometne potražnje, što znači da se mogu mijenjati ovisno o količini prometa. Ovaj rad bavi se analizom dva signalna raskrižja na području grada Rijeke. Uz pomoć raznih metoda kao što su: metoda brojanja prometa, metoda analize, metoda opažanja, metoda modeliranja te uz ulazne podatke o količini prometa, vrstama vozila koja se koriste raskrižjima, broju prilaznih traka i ostalih podataka analiza se uslužnost i kapacitet dva određena raskrižja. Analiza se provela u programima PTV Vissim i SIDRA Intersection.The traffic flow of urban roads belongs to the interrupted traffic flow, that it is periodically interrupted by intersections, in such a way all vehicles that want to use that part of the road get the right of way. At signalized intersections where traffic is managed by signal controllers, it is necessary to make high-quality signal plans such that a traffic demand is satisfied, which means that they can change depending on the traffic volume. The topic of this paper is analysis of two signalised intersections in city of Rijeka. With various methods such as: the traffic counting method, the analysis method, the observation method, the modeling method, and with the input data on the amount of traffic at intersections, the types of vehicles that use the intersections, the number of lanes and other data, the level of service and capacity of this two intersections are analysed. The analysis will be carried out in PTV Vissim and SIDRA Intersection software