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Analysis of vehicle-bicycle interactions at unsignalized crossings: A probabilistic approach and application
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Transportplanering, ekonomi och teknik.ORCID-id: 0000-0002-7080-5176
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Transportplanering, ekonomi och teknik. Northeastern University, United States.ORCID-id: 0000-0003-3830-9794
KTH, Skolan för arkitektur och samhällsbyggnad (ABE), Transportvetenskap, Transportplanering, ekonomi och teknik.ORCID-id: 0000-0001-5526-4511
2016 (Engelska)Ingår i: Accident Analysis and Prevention, ISSN 0001-4575, E-ISSN 1879-2057, Vol. 97, s. 38-48Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In the last decades, bicycle usage has been increasing in many countries due to the potential environmental and health benefits. Therefore, there is a need to better understand cyclists’ interactions with vehicles, and to build models and tools for evaluating multimodal transportation infrastructure with respect to cycling safety, accessibility, and other planning aspects. This paper presents a modeling framework to describe driver-cyclist interactions when they are approaching a conflicting zone. In particular, the car driver yielding behavior is modeled as a function of a number of explanatory variables. A two-level hierarchical, probabilistic framework (based on discrete choice theory) is proposed to capture the driver’s yielding decision process when interacting with a cyclist. The first level models the probability of the car driver perceiving a situation with a bicycle as a potential conflict whereas the second models the probability of yielding given that a conflict has been perceived by the driver. The framework also incorporates the randomness of the location of the drivers’ decision point. The methodology is applied in a case study using observations at a typical Swedish roundabout. The results show that the conflict probability is affected differently depending on the user (cyclist or driver) who arrives at the interaction zone first. The yielding probability depends on the speed of the vehicle and the proximity of the cyclist.

Ort, förlag, år, upplaga, sidor
Elsevier, 2016. Vol. 97, s. 38-48
Nyckelord [en]
Vehicle-bicycle interaction, Cyclist safety, Yielding behavior, Unsignalized intersection, Roundabout, Logit model, Maximum likelihood estimation
Nationell ämneskategori
Transportteknik och logistik
Forskningsämne
Transportvetenskap
Identifikatorer
URN: urn:nbn:se:kth:diva-192586DOI: 10.1016/j.aap.2016.08.016ISI: 000390634300004PubMedID: 27565043Scopus ID: 2-s2.0-84989298229OAI: oai:DiVA.org:kth-192586DiVA, id: diva2:971182
Anmärkning

QC 20160923

Tillgänglig från: 2016-09-15 Skapad: 2016-09-15 Senast uppdaterad: 2024-03-18Bibliografiskt granskad
Ingår i avhandling
1. Advancing Traffic Safety: An evaluation of speed limits, vehicle-bicycle interactions, and I2V systems
Öppna denna publikation i ny flik eller fönster >>Advancing Traffic Safety: An evaluation of speed limits, vehicle-bicycle interactions, and I2V systems
2016 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Since the introduction of motor vehicles, the number of fatalities and accidents has been a concern for society.The number of fatalities on roads is amongst the most common causes of mortality worldwide (WHO, 2015).Even in industrialized countries the number of fatalities remains unacceptable. Therefore, in the last decades, anumber of approaches have emerged to support and boost traffic safety towards a system free from fatalities andserious impairment outcomes. ‘Sustainable Safety’ and ‘Vision Zero’ are well-known examples aiming to avoidfatalities within the traffic system and reduce injury severity when a traffic accident is inevitable. However, thenumber of fatalities and seriously injured accidents are still relatively high. More specifically, vulnerable roadusers remain involved in fatal and serious accidents even in industrialized countries. Therefore, further advancesin traffic safety studies are needed. This thesis aims at evaluating the impact of road characteristics, traffic rulesand information provision towards a safer traffic system. The thesis is composed of five scientific papers whichsummarizes the main contributions of this work.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH, 2016. s. 20
Serie
TRITA-TSC-PHD ; 16-008
Nyckelord
Traffic safety, urban roads, posted speed limits, road characteristics, free-flow speed, time headway, vehicle-bicycle interactions, logit model, yielding probability, cooperative systems and warning messages.
Nationell ämneskategori
Transportteknik och logistik
Forskningsämne
Transportvetenskap
Identifikatorer
urn:nbn:se:kth:diva-195640 (URN)978-91-87353-94-9 (ISBN)
Disputation
2016-12-16, Kollegiesalen, Brinellvägen 8, Stockholm, 14:00 (Engelska)
Opponent
Handledare
Anmärkning

QC 20161109

Tillgänglig från: 2016-11-09 Skapad: 2016-11-07 Senast uppdaterad: 2022-06-27Bibliografiskt granskad

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Silvano, AryKoutsopoulos, HarisMa, Xiaoliang

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