Abstract

The paper demonstrates the influence of the multi-channel pedestrian flow on the actual capacity of a one-lane roundabout, using micro-simulation and discrete functions. The proposed model is based on the theory of the expected time gap between the units of pedestrian traffic flow, which have the priority when crossing the arm of the roundabout. The proposed model represents an upgrade of the previous research in the field of modelling traffic flows in the one-lane roundabout.Apart from the multi-channel pedestrian flow the disturbances caused by the circular traffic flow of motorised vehicles at the roundabout are also considered. In this way the model can better illustrate the real conditions in traffic. A simulation analysis has been performed on the roundabout arm at Koroška Street in Maribor. The results of the analysis have indicated a relatively high reserve of the actual throughput capacity for the main motorized traffic flow in the analysed roundabout arm. The presented model represents a practicable and adaptable tool for planning the roundabout capacity in practice and for the sensitivity analysis of individual variables on the throughput capacity of the roundabout. Prispevek prikazuje vpliv večkanalnega toka pešcev na dejansko propustno sposobnost eno-pasovnega krožnega križišča z uporabo mikro-simulacij in diskretnih funkcij. Predlagani model temelji na teoriji pričakovane časovne praznine med enotami prometnega toka pešcev, ki imajo pri prečkanju kraka krožnega križišča prednost pred motornimi vozili. Predlagani model predstavlja nadgradnjo predhodnih raziskav na področju modeliranja prometnih tokov v enopasovem krožnem križišču. Poleg večkanalnega toka pešcev so hkrati upoštevane tudi motnje zaradi krožečega toka motornih vozil v krožišč. S tem je doseženo, da model se bolje ponazarja realno dogajanje v prometu. Simulacijska analiza je bila izvedena na krožnem križišču, ki se nahaja na Koroški ulici v Mariboru. Rezultati analize so pokazali sorazmerno visoko propustno sposobnost glavnega prometnega toka motornih vozil v analiziranem kraku krožišča. Predstavljeni model predstavlja uporabno in prilagodljivo orodje za načrtovanje kapacitete krožišč v praksi in analiza vpliva posameznih spremenljivk na propustno sposobnost krožišča.