Driving dynamic aspects and related safety issues for modern geometric design of non-built-up roads

Lamm, R; Psarianos, B; Soilemezoglou, G; Kanellaidis, G

dc.contributor.author	Lamm, R	en
dc.contributor.author	Psarianos, B	en
dc.contributor.author	Soilemezoglou, G	en
dc.contributor.author	Kanellaidis, G	en
dc.date.accessioned	2014-03-01T01:11:54Z
dc.date.available	2014-03-01T01:11:54Z
dc.date.issued	1996	en
dc.identifier.issn	03611981	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11852
dc.subject.other	Accident prevention	en
dc.subject.other	Curves (road)	en
dc.subject.other	Dynamics	en
dc.subject.other	Evaluation	en
dc.subject.other	Friction	en
dc.subject.other	Highway engineering	en
dc.subject.other	Speed	en
dc.subject.other	Driving dynamic	en
dc.subject.other	Geometric design	en
dc.subject.other	Non built up roads	en
dc.subject.other	Side friction factors	en
dc.subject.other	Roads and streets	en
dc.title	Driving dynamic aspects and related safety issues for modern geometric design of non-built-up roads	en
heal.type	journalArticle	en
heal.identifier.primary	10.3141/1523-05	en
heal.identifier.secondary	http://dx.doi.org/10.3141/1523-05	en
heal.publicationDate	1996	en
heal.abstract	Safety issues affecting modern highway geometric design of roads in non-built-up areas are discussed. The status of knowledge of Safety Criteria I and II (achieving operating speed consistency and design consistency) for two-lane rural roads is briefly reviewed. Considerations for design consistency are also extended to multiple-lane rural and suburban road design to evaluate good, fair, and poor design levels for these road categories. Utilization ratios (n) for maximum permissible side friction factors are developed for different road categories, topography levels, and maximum and minimum superelevation rates. Relevant minimum radii for curve design are established and compared with present AASHTO values insofar as possible. Safety Criterion III (achieving driving dynamic consistency) is further developed, through which reliable and quantitative ranges between the side friction assumed and the actual friction demand at curved sites could be established. AASHTO's design policy is evaluated on the basis of Criteria II and III. The evaluation showed, for lower design speeds (30, 40, and 50 mph), an unbalanced degree of curve and superelevation rate ranges, which lead to poor design practices from a safety viewpoint. By heeding the three safety criteria and the recommended side-friction utilization ratios, sound alignments can be established for the various design cases in future highway geometric design and redesign and for resurfacing, restoration, and rehabilitation strategies.	en
heal.journalName	Transportation Research Record	en
dc.identifier.doi	10.3141/1523-05	en
dc.identifier.issue	1523	en
dc.identifier.spage	34	en
dc.identifier.epage	45	en