Required stopping sight distance on crest vertical curves

Taignidis, I; Kanellaidis, G

dc.contributor.author	Taignidis, I	en
dc.contributor.author	Kanellaidis, G	en
dc.date.accessioned	2014-03-01T01:17:01Z
dc.date.available	2014-03-01T01:17:01Z
dc.date.issued	2001	en
dc.identifier.issn	0733-947X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14328
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Transportation Science & Technology	en
dc.subject.other	Braking	en
dc.subject.other	Highway engineering	en
dc.subject.other	Highway planning	en
dc.subject.other	Stopping sight distance	en
dc.subject.other	Vertical curvature	en
dc.subject.other	Curves (road)	en
dc.subject.other	curvature	en
dc.title	Required stopping sight distance on crest vertical curves	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)0733-947X(2001)127:4(275)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)0733-947X(2001)127:4(275)	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	Required stopping sight distance (SSD), used to calculate the minimum rate of vertical curvature or the minimum length of a crest vertical curve (CVC), is usually calculated on the assumption that the grade of the braking section is zero (G = 0). This assumption is not the worst case and may lead to the selection of a CVC on which there is a segment with SSD restriction. On each CVC there are braking sections on one or both directions of travel, on which average grade is negative (G < 0). In the present paper a method for calculating required SSD, partly or wholly on a CVC, is developed, using the average grade over the braking distance. In addition, a computer program is compiled for calculating the value of the required SSD for all driver positions before or on a CVC. An SSD profile is drawn and it is proven that, for a significant length of the CVC, the required SSD is greater than the value used for calculating the minimum value of the rate of vertical curvature.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Transportation Engineering	en
dc.identifier.doi	10.1061/(ASCE)0733-947X(2001)127:4(275)	en
dc.identifier.isi	ISI:000169301000002	en
dc.identifier.volume	127	en
dc.identifier.issue	4	en
dc.identifier.spage	275	en
dc.identifier.epage	282	en