Title: CAPACITY OF TWO-LANE, TWO-WAY RURAL HIGHWAYS: THE NEW APPROACH
Abstract: The development of methodology analysis of traffic flow on two-lane, two-way highways is described. The extensive data were collated through 7 days of measuring on the primary road section Zagreb-Velika Gorica (Zagreb Airport). On the basis of overtaking, the new vehicle classification from the aspect of position in traffic flow is defined. By concentrating vehicles into two groups, vehicle file and vehicles involved in overtaking, the four possible combinations of traffic flow condition are introduced. Traffic flows were divided on a time basis, on a functional basis, and from the aspect of car-following. On those bases 24 relationship curves between fundamental traffic stream variables were developed. Different divisions of traffic flows proved that divisions on a time basis do not yield real values of the capacity and have to be rejected. Combinations of traffic flow condition offer a basis for calculation of capacity and levels of service. Classification of flow from the aspect of car-following gives the capacity of a traffic lane and ideal capacity of a highway. It was proved that calculation of capacity depends, in addition to already known elements, on the method of measuring and dividing the traffic flow. Computer programs for graphical presentation of vehicle trajectories in space-time charts, as well as for numerical analyses and graphical depiction of different combinations of traffic flow condition, were developed.
Publication Year: 1992
Publication Date: 1992-01-01
Language: en
Type: article
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Cited By Count: 7
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