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Highway geometric design based on reliability theory(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2010年04期
Page:
46-50
Research Field:
Publishing date:
2010-08-20

Info

Title:
Highway geometric design based on reliability theory
Author(s):
ZHU Xing-lin
School of Machinery and Traffic, Xinjiang Agricultural University, Urumqi 830052, Xinjiang, China
Keywords:
road engineering;  reliability model;  probability theory;  highway alignment design;  safe margin
PACS:
U412.35
DOI:
-
Abstract:
Considering the uncertainty of highway geometry design parameters, the reliability models involved in stop sight distance(SSD), horizontal curve radius(HCR)and vertical curve radius(VCR)are developed based on probability theory. Reliability indexes and failure probability are obtained by reliability calculation method and are used to analyze reliability of highway alignment design indicators. The study results show that the reduction of stop sight distance(SSD)should be limited in the range of 15 percent at any point in highway to guarantee the reliability of SSD. The declination of lateral friction factors significantly affects the reliability of HCR. If the reduction of VCR exceeds a certain value, the VCR reliability will sharply decline. Reliability theory in highway alignment design provide theoretical basis for the designers who are confused about the best choice between safety and cost for any factor. Meanwhile, it offers the designers a new design idea. 2 tabs, 8 figs, 9 refs.

References:

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Memo

Memo:
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Last Update: 2010-08-20