Assessment of the design of reverse horizontal curves to accommodate heavy vehicles based on simulation

Kazagli, EA; Psarianos, B

dc.contributor.author	Kazagli, EA	en
dc.contributor.author	Psarianos, B	en
dc.date.accessioned	2014-03-01T02:01:45Z
dc.date.available	2014-03-01T02:01:45Z
dc.date.issued	2011	en
dc.identifier.issn	18245463	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/29244
dc.subject	Design parameters	en
dc.subject	Heavy vehicles	en
dc.subject	Reverse horizontal curves	en
dc.subject	Simulation	en
dc.subject	Tires and friction	en
dc.subject	Vehicle dynamics	en
dc.subject.other	Design parameters	en
dc.subject.other	Heavy vehicles	en
dc.subject.other	Reverse horizontal curves	en
dc.subject.other	Simulation	en
dc.subject.other	Vehicle dynamics	en
dc.subject.other	Automobiles	en
dc.subject.other	Design	en
dc.subject.other	Dynamic response	en
dc.subject.other	Friction	en
dc.subject.other	Geometry	en
dc.subject.other	Optimization	en
dc.subject.other	Vehicles	en
dc.subject.other	Curves (road)	en
dc.title	Assessment of the design of reverse horizontal curves to accommodate heavy vehicles based on simulation	en
heal.type	journalArticle	en
heal.identifier.primary	10.4399/97888548388641	en
heal.identifier.secondary	http://dx.doi.org/10.4399/97888548388641	en
heal.publicationDate	2011	en
heal.abstract	Current geometric design policies use passenger cars as design vehicles, while truck operational and dynamic characteristics are not included or not addressed consistently. Furthermore, critical geometric design parameters such as horizontal curves radii are determined without consideration of the effect of vertical alignment. The objective of this work is to investigate whether critical road sections such as reverse horizontal curves with spiral curves, can accommodate typical heavy vehicles with safety. The analysis was focused on rural and suburban two-lane roads with undivided pavement that produce the largest accident rates. By means of ""road - driver - vehicle"" simulation system developed in TruckSim, the vehicle dynamic response to inputs from the immediate environment is analyzed, while same kind of outputs that might be measured with physical tests involving instrumented vehicles are calculated and plotted. Results indicated that horizontal curves minimum radii that are implemented according to several design criteria, can not be used in conjunction with the allowed interval of grades, and that the table of minimum radii must comprehend a limitation for the applicable grade. Otherwise, exclusively speed limits depending on the road geometry or larger radii must be used in order to adequately accommodate heavy vehicles.	en
heal.journalName	Advances in Transportation Studies	en
dc.identifier.doi	10.4399/97888548388641	en
dc.identifier.issue	23	en
dc.identifier.spage	5	en
dc.identifier.epage	14	en