Abstract
Building of arterials in densely populated urban areas needs significant financial expenses. In the situation when the available financial resources for street and bridge construction are limited, the most important issue is to evaluate all possible ways to reduce the total road construction costs what is first of all achieved by reducing geometrical parameters of arterials. These parameters are reduced by changing the design speed, while ensuring an adequate level of traffic safety. Therefore there is a need for a review of standards for the street functions and categories of streets in urban areas. An analysis of average momentary speed impact on urban street and road network design, as well as momentary speed impact on traffic conditions has been done. A relationship between design speed and momentary speed at different capacity ratio of traffic flow has been found.
Highlights
The construction of modern new arterial streets in densely populated urban areas requires very significant capital investments that are connected with the demolition of the existing housing, relocation of businesses, relocation of population to other areas, expropriation of land, reconstruction of utilities, etc. (Melo et al 2013)
The aim of this study is to evaluate the indicators of traffic flow on arterials in the urban street network with free traffic flow
It has to be noted that congestion in peak hours in today’s street network amounts to 12–14 hours, and the present study testifies that the speed that was used initially for designing the arterials streets is not implemented in approximately half of the day
Summary
The construction of modern new arterial streets in densely populated urban areas requires very significant capital investments that are connected with the demolition of the existing housing, relocation of businesses, relocation of population to other areas, expropriation of land, reconstruction of utilities, etc. (Melo et al 2013). When the financing for street construction becomes very limited the issue of possible reduction in the road construction costs becomes very topical (Anas, Hiramatsu 2012). It is achieved by reducing the design speed on arterials. The aim of this study is to evaluate the indicators of traffic flow on arterials in the urban street network with free traffic flow. To achieve this aim it is necessary to determine the interrelations of momentary speed, traffic volume and traffic flow density (Islam et al 2014). The interrelation between design speed and 95% momentary speed at different level of traffic load has to be determined
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