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Application of ViVA traffic to study the interaction between vulnerable road users and motor vehicle drivers: case studies in Sweden and Germany
2000 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

When studying the traffic situation for vulnerable road users the focus has been on working with conventional methods of studies of conflicts. At Luleå University of Technology the attention is now, more and more, being focused on a German semiautomatic video based computer program, ViVAtraffic, which has been developed by the GVA Gesellschaft für VerkehrsAnalyse in Kaiserslautern, Germany, as a help for studies of conflicts. One part of this thesis is an evaluation of the applicability of ViVAtraffic for studies of conflicts with vulnerable road users, out of comparisons between results obtained from ViVAtraffic and conventional methods - radar measurements and trained observers. In this report only some preliminary results of the analyses of the data gathered for the reliability test of ViVAtraffic are presented. The full analysis will be presented elsewhere. The second part of the thesis is two comparisons of the vehicle drivers' behaviour in Germany respectively Sweden when approaching a zebra crossing where a pedestrian wants to cross the street. For the evaluation of ViVAtraffic's applicability the Regementsgatan/Skvadronsgatan-intersection in Malmö, Sweden, was chosen as test site. A mathematical statistical comparison between ViVAtraffic's estimates and radar measurements of motor vehicles' velocity indicates that ViVAtraffic has a good agreement with radar measurements. A training film, made by the University of Lund, with several conflicts of different severity levels was used for training of three observers. The goal was to pass a test according to the Swedish national Road Administration's study-of-conflict-education. The observers continued their practice with films from Regementsgatan for which several radar measurements had been done. The reliability test of the three observers is based on observations of two hours of video filming in Malmö. The following four parameters are compared: • Velocity of pedestrians • Velocity of cyclists • Velocity of motor vehicles • Time to Accident, TA The test sites chosen for the comparisons of the vehicle drivers' behaviour were the intersection between Friedrichstraße and Augustastraße in Kaiserslautern, Germany, and the Regementsgatan/Skvadronsgatan-intersection in Malmö, Sweden. The first comparison concerned the frequency of vehicle drivers that stop or give way for pedestrians divided into 3 different age categories, at zebra crossings. The other comparison made between the countries was concerning the acceleration/deceleration behaviour of the vehicle drivers when approaching a zebra crossing. In both comparisons the differences were rather clear. In general, the velocity of the vehicle drivers in Germany is decreasing the nearer the zebra crossing they get with U-shaped acceleration trends. This indicates a defensive way of driving. In contrast to the German drivers the Swedish drivers' velocity is increasing the closer they get. Their acceleration trends are generally constant upward or strongly increasing in the beginning and then take a more horizontal shape. These are characteristics of an offensive way of driving.

Place, publisher, year, edition, pages
2000.
Keyword [en]
Technology, Traffic safety, conflicts, road user behaviour, Time, to Accident, Deceleration to Safety Time, Swedish Traffic, Conflicts Technique
Keyword [sv]
Teknik
Identifiers
URN: urn:nbn:se:ltu:diva-54816ISRN: LTU-EX--00/116--SELocal ID: bc04cb08-a477-4efd-b9ec-2aaa4cb33ce2OAI: oai:DiVA.org:ltu-54816DiVA: diva2:1028198
Subject / course
Student thesis, at least 30 credits
Educational program
Civil Engineering programmes 1997-2000, master's level
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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