engleski

Review, testing and validation of capacity and delay models at unsignalized intersections

This paper deals with problems related to the capacity and delay models at unsignalized intersections. The parameters of various models are calibrated on site data in the countries where the models were developed. These paper deals with two problems: The first is a reliability of applied methodology in general, and second is acceptability of model parameters for the use in prevailing road and traffic conditions in Croatia. The first section presents the background review of the gap acceptance theory which is the basis for the development of the capacity and delay models. The mathematical derivation of the basic capacity models is presented as well as the resulting capacity models according to the assumed theoretical distribution of headways in the priority stream. This paper also presents the methods for the calculation of the capacity considering the existence of traffic streams of different hierarchies. The results of various theoretical capacity models testing are presented. The second section presents a review of queuing theory and resulting stationary and time dependent delay models. The underlying hypothesis as well as reliability and limitations of the delay models are presented. Also the Highway capacity manual delay model was tested against field data.

UNSIGNALIZED INTERSECTION; CAPACITY; DELAY

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