Aplicação de métodos determinísticos para a obtenção de gap crítico em rotatórias urbanas brasileiras
DOI:
https://doi.org/10.14295/transportes.v27i4.1866Keywords:
Roundabout, Critical gap, Capacity.Abstract
This paper focuses on evaluating the critical gap and the follow-up headway for Brazilian roundabouts and on comparing it to the results of foreign studies. Three two-lane roundabouts were selected to obtain the critical gap through five methods: Siegloch (1973), Raff (1950), Miller & Pretty (1968), Wu (2012) and Bunker (2012). Through the first method, it was also possible to obtain the follow-up headway. The critical gap values were considerably different in each lane: on the right lane, the drivers accepted smaller gaps to cross to the intersection. This difference was not significant when it came to the follow-up headway. After that, the critical gap estimation methods were validated by comparing the intersection’s capacity using the Hagring (1998) method with the combined data per minute of traffic flow. Finally, the resulting Brazilian values were compared to foreign data. There were similarities to the results found in countries like Switzerland, Italy and Portugal.Downloads
References
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