Unsignalized intersections are the most common form of intersections. Although their capacities are usually lower than other types of intersections, they have an important role in the transport network. The article deals with gap acceptance parameters at unsignalized intersections and roundabouts.
Gap acceptance models are used for analyzing unsignalized intersections and roundabouts. The main parameters of these models are the critical gap (tc) and follow-up time (tf). Capacity analysis are done according to the HCM methodology, which is also recognized and prescribed by the Slovenian Infrastructure Agency for signalized and unsignalized intersections and determined by the Pravilnik o projektiranju cest (Ur.l. RS, št. 91/2005, Ur.l. RS, št. 26/2006, 109/2010-ZCes-1) and Pravilnik o cestnih priključkih na javne ceste (Ur.l. RS, št. 86/2010, Ur.l. RS, št. 109/2010-ZCes-1). They give values of critical gaps and follow-up times, which are not necessarily representative for Slovenian drivers.
The goal is to determine critical gaps and follow-up times for drivers in Slovenia. Services from RCE systems s.r.o. and their cloud product DataFromSky TrafficSurvey are used to obtain gap times and follow-up times from recorded videos of intersections. Follow-up times are measured directly by the software, while the critical gap is determined by one of many statistical methods.
The obtained results for Slovenian drivers are then compared with the capacity analyzes of various models used with the micro-analytical software SIDRA INTERSECTION 9.0.
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