Perceived level of service, driver, and traffic characteristics: Piecewise linear model

Papadimitriou, E; Mylona, V; Golias, J

dc.contributor.author	Papadimitriou, E	en
dc.contributor.author	Mylona, V	en
dc.contributor.author	Golias, J	en
dc.date.accessioned	2014-03-01T01:34:09Z
dc.date.available	2014-03-01T01:34:09Z
dc.date.issued	2010	en
dc.identifier.issn	0733-947X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20675
dc.subject	Driver characteristics	en
dc.subject	Level of service thresholds	en
dc.subject	Perceived level of service	en
dc.subject	Piecewise linear regression	en
dc.subject	Volume to capacity	en
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Transportation Science & Technology	en
dc.subject.other	Break-points	en
dc.subject.other	Driver characteristics	en
dc.subject.other	Exploratory analysis	en
dc.subject.other	Field surveys	en
dc.subject.other	Highway Capacity Manual	en
dc.subject.other	Large dispersion	en
dc.subject.other	Level of Service	en
dc.subject.other	Non-parametric statistical tests	en
dc.subject.other	Personal characteristics	en
dc.subject.other	Piecewise linear	en
dc.subject.other	Piecewise linear models	en
dc.subject.other	Piecewise linear regression	en
dc.subject.other	Traffic characteristics	en
dc.subject.other	Traffic conditions	en
dc.subject.other	Traffic counts	en
dc.subject.other	Vehicle capacity	en
dc.subject.other	Volume to capacity	en
dc.subject.other	Highway engineering	en
dc.subject.other	Linear regression	en
dc.subject.other	Piecewise linear techniques	en
dc.subject.other	Statistical tests	en
dc.subject.other	Traffic congestion	en
dc.subject.other	Motor transportation	en
dc.subject.other	linearity	en
dc.subject.other	model test	en
dc.subject.other	model validation	en
dc.subject.other	perception	en
dc.subject.other	regression analysis	en
dc.subject.other	research work	en
dc.subject.other	service provision	en
dc.subject.other	traffic congestion	en
dc.title	Perceived level of service, driver, and traffic characteristics: Piecewise linear model	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)TE.1943-5436.0000154	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)TE.1943-5436.0000154	en
heal.identifier.secondary	006010QTE	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The objective of this research is the analysis of perceived highway level of service in relation to drivers' personal characteristics and traffic conditions. A field survey was carried out for that purpose, in which drivers were asked to assess the traffic conditions experienced on a freeway segment, just after having actually driven along this segment. At the same time, traffic counts were taking place. Exploratory analysis revealed a large dispersion in drivers' assessment of level of service for each volume-to-capacity (v/c) value, especially at moderate traffic conditions. Furthermore, the effect of driver's age, gender, driving experience, familiarity with the road, vehicle capacity, and v/c on perceived level of service was examined by means of nonparametric statistical tests. It was found that, in this sample, only traffic conditions affected drivers' assessment of level of service. Perceived level of service was then modeled against v/c by means of a piecewise linear regression technique for three scenarios, covering different types of drivers with respect to their tolerance of congestion. The results confirm that the relationship between perceived level of service and traffic conditions has a piecewise linear form with significant differences in slopes and breakpoints. Moreover, they suggest that drivers perceive no more than two or three levels of traffic conditions. More specifically, only low-tolerance drivers appear to distinguish level of service A from B and only high-tolerance drivers appear to distinguish level of service D from E. On the contrary, an impressive reduction of perceived level of service occurs within the v/c interval of 0.55-0.70 in all scenarios. These findings are further discussed in relation to their accordance with the highway capacity manual approach for level of service and its possible adjustments. © 2010 ASCE.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Transportation Engineering	en
dc.identifier.doi	10.1061/(ASCE)TE.1943-5436.0000154	en
dc.identifier.isi	ISI:000281971000005	en
dc.identifier.volume	136	en
dc.identifier.issue	10	en
dc.identifier.spage	887	en
dc.identifier.epage	894	en