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Traffic safety of older drivers in various types of road intersections
Tomaž Tollazzi, Marko Renčelj, Vlasta Rodošek, Borut Zalar, 2010, pregledni znanstveni članek

Opis: In industrialized countries people over 50 years of age represent a rapidly growing part of population. Their lifestyle is also becoming more active, which means that the percentage of older drivers in the population of all drivers is also increasing. Many different studies have shown that elderly drivers are more frequently involved in specific types of accidents, especially at intersections. In the past 15 years there was a trend of increasing popularity of roundabouts in Slovenia. Their introduction was generally supported by the arguments of increased traffic-flow capacity and traffic safety as well. The studies on which these arguments are based were performed with an “ideal” type of driver in mind; the one that fully understands new rules and reacts correctly in all situations that may occur at such intersections, where there are no light signals to guide them. An elderly person does not necessarily conform to that ideal and if the percentage of elderly drivers became significant, the premises of the above mentioned studies may not be correct anymore which in turn implies that their results could also be questioned. The present study concentrated on the evaluation of traffic safety of elderly drivers, at various types of intersection, from their own perspective. Various statistical analyses of obtained data were performed. The most important finding was that we may claim, with high degree of probability, that the average person of the age of over 60 feels more unsafe at double-lane roundabouts than they would feel had the same intersection been equipped with traffic lights. Elderly traffic participants will always cause more accidents or participate in them due to hazardous factors. Challenge, arising from many different studies and researches, is in studying what measures and solutions can reduce the risk for elderly participants.
Ključne besede: traffic safety, road intersections, roundabouts, elderly people
Objavljeno: 06.06.2017; Ogledov: 815; Prenosov: 277
.pdf Celotno besedilo (811,32 KB)
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Dimensioning of signalized intersections in realistic urban environment
Matej Dobovšek, Drago Sever, 2005, pregledni znanstveni članek

Opis: It is very complex to assure the dynamics of traffic networkin urban environment because of the intensity of traffic flowsand the limited space in the urban area. Signalized intersectionsare undoubtedly very important and frequent element inroad traffic network in urban regions, which greatly influencesthe traffic flow dynamics on each section as in the whole trafficnetwork. The time (delay) a vehicle needs to drive through anintersection directly influences the travel comfort, fuel consumption,traffic pollution and so on. There are many methodsfor dimensioning signalized intersections in the world literature.One of the most applied methods is the HIGHWAY CAPACI1YMANUAL (HCM) 2000 which is based on competentinput traffic flows and other characteristics of traffic signalregulations. The intention of this paper is to establish whetherwe can use the HCM 2000 method directly in the Slovenian realenvironment. Based on the established methodology of researchand limited number of delay measurement in real environmentintersections, there have been some deviations. Thecompletion of the level of service criterion for signalized intersectionshas been proposed, with the intention for more suitabilityestimation in the realistic environment.
Ključne besede: road traffic, intersections, signallization, control delay measurement, level of service
Objavljeno: 02.06.2017; Ogledov: 662; Prenosov: 86
.pdf Celotno besedilo (2,73 MB)
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Alternative possibilities for defining the length of the separate left-turn lane at the existing level intersection
Tomaž Tollazzi, 2002, pregledni znanstveni članek

Opis: The market offers various computer programs for simulating traffic flows at level intersections whose mathematical background is not known to the end users. Thus the user only enters the data without being aware of how the program works. The results obtained cannot be evaluated properly, which may lead to subjective decisions. The paper presents some simple mathematical alternatives which are used to determine the length of a left-turn lane in a level intersection.
Ključne besede: road traffic, roads, level intersections, lane length, left-turn lane
Objavljeno: 31.05.2017; Ogledov: 719; Prenosov: 58
.pdf Celotno besedilo (1,21 MB)
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