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The article investigates the spatial effects of traffic congestion. Three and four legged rural road intersection are analyzed, regarding single and double through lanes. The analysis is based on momentary individual vehicle speeds, but other flow parameters are taken into account as well. Values are determined by ways of microsimulation, results a...
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Citations
... The aim of this study was searching connections between the capacity of streets, types of traffic calming methods and characteristics of the urban street layout at the whole network [13]. For this purpose, static macroscopic transportation models were used for traffic assignment. ...
One of the most important challenges in urban design is planning an appropriate street network, satisfying the demand of users with different transport modes. Understanding the nature of road networks has been thoroughly studied problem for many years and extensive professional literature is now available in this respect. In this study, five different micro-districts and their road networks have been analyzed in Budapest. Therefore, this paper is aimed at providing a contribution to the knowledge of comparing road networks of different residential estates under different traffic loads. Moreover, significant similarities and differences were identified among urban street layouts in this paper.
... Finally, for each lane vehicle delays [21,25,26] were estimated through the following formulations [21]: ...
Analysis of literature shows that “modern roundabouts” nowadays exist in all European countries, as well as in more than 60 countries elsewhere in the world. Nowadays, a growing number of studies, presented in scientific and professional literature, point out a poor traffic safety characteristics of “standard” two-lane roundabouts and lower capacity then was expected. These problems are resolved in more ways in different countries; however the solution, whereby the number of conflict spots is diminished has proven to be the most successful. Lower number of conflict spots is one of characteristics of the alternative types of roundabouts. The alternative types of roundabouts are usually more recent and implemented only in certain countries. It is typical for them that they differ from “standard” one- and two-lane roundabouts in one or more design elements, while the purpose of their implementation is also specific. This paper illustrate four relative new alternative types of roundabouts - “turbo”, “flower”, “target” and “four flyover” roundabouts and their comparison from designing, capacity and traffic - safety point of view.
... This paper merges and extends two previously introduced concepts: intersection-specific time-delay functions [1] and affection radius of singular junctions [2]. ...
... When junctions are close, congestion caused by an oversaturated intersection is affecting neighbouring junctions' traffic flow triggering traffic jams remotely or amplifying already existing ones. For the spatial limit of junction interaction the concept of 'affection radius' [2] is utilised in the paper to demonstrate that intersection distance has no effect on the shape of delay function -due to a specific restriction of function fitting. ...
... The notation concept used throughout this paper is: n x mL, where n = 'number of intersections', and m = 'number of junction legs' (i.e. 3 or 4). A suffix of in denotes junction compositions where intersections were inside each other's affection radius (see [2] for details). ...
Describing the relationship between vehicle volume and travel time delay on road sections consisting multiple intersections in the context of junction quantity is favorable to extend the advantage of intersection-specific volume-delay functions. This paper demonstrates a microsimulation method combined with a non-linear function fitting algorithm to determine unbiased delay function parameters and inspect the effect of junction number on time delays. Results are bifold: first the distance between intersections deemed irrelevant regarding delay function shape, second the implicit scaling property of homogenous junction chains is revealed. Consequently the definition of time delay on uniform intersection chains can be determined by a sole parameter set for the volume-delay function and the addition of a single scaling variable.
