Speed behavior analysis at curved ramp sections of minor interchanges

Liapis, ED; Psarianos, B; Kasapi, E

dc.contributor.author	Liapis, ED	en
dc.contributor.author	Psarianos, B	en
dc.contributor.author	Kasapi, E	en
dc.date.accessioned	2014-03-01T02:41:59Z
dc.date.available	2014-03-01T02:41:59Z
dc.date.issued	2001	en
dc.identifier.issn	0361-1981	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30722
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0035741975&partnerID=40&md5=cbf72c0db6c1bd00d865dcf6db65e3f3	en
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0035741975&partnerID=40&md5=cbf72c0db6c1bd00d865dcf6db65e3f3	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Transportation	en
dc.subject.classification	Transportation Science & Technology	en
dc.subject.other	Ground vehicles	en
dc.subject.other	Highway systems	en
dc.subject.other	Intersections	en
dc.subject.other	Mathematical models	en
dc.subject.other	Regression analysis	en
dc.subject.other	Speed	en
dc.subject.other	Speed behavior analysis	en
dc.subject.other	Motor transportation	en
dc.title	Speed behavior analysis at curved ramp sections of minor interchanges	en
heal.type	conferenceItem	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	On and off ramps act as interfaces between freeways and the surface street network (nonfreeway highways) and in effect should provide a smooth and safe transition from one facility to another. The speed behavior of passenger cars at minor-interchange on and off ramps with unusual curved arrangements is analyzed in depth for the first time. Vehicle speed data were collected at 20 on and off ramps in Greece that have a variety of geometric features. Regression analyses were applied to investigate the variables affecting operating speed - V85. The best models resulted in coefficients of determination of nearly 0.75, indicating that operating speed is influenced by curvature change rate and superelevation rate. Comparison of the ""Greek speed profile"" with those of Australia, Austria, Germany, South Africa, and the United States proved that for on and off ramps it very closely approximates the values of Australia, Austria, and Germany. Austria is the only country using V85 to determine ramp geometrics. The differences between the Greek V85 and the speed values recommended by the German guidelines are considered small, ranging from 6 to 9 km/h for on ramps and -1.5 up to -4 km/h for off ramps. The analysis produced regression models that will provide designers with a tool to estimate the operating speed during the design process.	en
heal.publisher	TRANSPORTATION RESEARCH BOARD NATL RESEARCH COUNCIL	en
heal.journalName	Transportation Research Record	en
heal.bookName	TRANSPORTATION RESEARCH RECORD	en
dc.identifier.isi	ISI:000176559100005	en
dc.identifier.issue	1751	en
dc.identifier.spage	35	en
dc.identifier.epage	43	en