Different grades of roads have different function goals during the process of planning and design. The extent of function realization has significant effects on the operational efficiency of a road network system. In accordance with the function description of urban expressways in the Code for Design of Urban Road Engineering (CJJ37—2012), this study presents the concept of urban expressway functional reliability. This concept is also considered as a quantitative and probability evaluation index of the achievement degree of expressway functions. The calculation method of expressway functional reliability is constructed by combining vehicle speed with the coefficient of headway variation. The similarities and differences between the level of service and the proposed function reliability are discussed. Three expressway sections in Zhengzhou city are taken as case studies. The independence between vehicle speed and headway variation coefficient is verified based on the real data collected through video. Functional reliability evaluation results agree well with the results from the service level analysis, which proves the feasibility and applicability of the proposed method.
Urban Expressway Functional Reliability
2016-05-16
52016-01-01 pages
Article (Journal)
Electronic Resource
Unknown
Elgin-O'Hare Expressway Urban Environmental Preservation
British Library Conference Proceedings | 1995
|Evaluation of the Impact of Travel Time Reliability on Urban Expressway Traffic Safety
Transportation Research Record | 2016
|Interchange Capacity Model of Urban Expressway
ASCE | 2009
|Interchange Capacity Model of Urban Expressway
British Library Conference Proceedings | 2009
|