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Document Server@UHasselt (58.393 recursos)

Repository of the University of Hasselt containing publications in the fields of statistics, computer science, information strategies and material from the Institute for behavioural sciences.

Transportation Sciences - Traffic Safety

Mostrando recursos 1 - 20 de 187

  1. Cognitive processes and attitudes in bipolar disorder: A study into personality, dysfunctional attitudes and attention bias in patients with bipolar disorder and their relatives

    Jabben, Nienke; Arts, Baer; JONGEN, Ellen; Smulders, Fren T. Y.; van Os, Jim; Krabbendam, Lydia
    Background: Research in cognitive processes and attitudes in bipolar disorder is scarce and has provided mixed findings, possibly due to differences in current mood state. It is unclear whether alterations in cognitive processes and attitudes are only related to the depressive mood states of bipolar patients or also represent a vulnerability marker for the development of future (depressive) episodes. This was investigated in the current study. Methods: Both implicit (attentional bias for emotional words) and explicit (dysfunctional attitudes and personality characteristics) measures of cognitive processes and attitudes were assessed in 77 bipolar patients with varying levels of depressive symptoms (depressed...

  2. Proactive Approaches in Quantitative Micro- and Macroscopic Crash Analysis: Focus on Model-Based Safety Evaluation of Traffic Policy Measures

    Pirdavani, Ali

  3. Spatial Analysis of Fatal and Injury Crashes in Flanders, Belgium: Application of Geographically Weighted Regression

    Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Wets, Geert
    Generalized Linear Models (GLMs) are the most widely used models utilized in crash prediction studies. These models illustrate the relationships between the dependent and explanatory variables by estimating fixed global estimates. Since the crash occurrences are often spatially heterogeneous and are affected by many spatial variables, the existence of spatial correlation in the data is examined by means of calculating Moran’s I measures for dependent and explanatory variables. The results indicate the necessity of considering the spatial correlation when developing crash prediction models. The main objective of this research is to develop different Zonal Crash Prediction Models (ZCPMs) within the...

  4. Assessing the Impacts of a Teleworking Policy on Crash Occurrence: The Case of Flanders, Belgium

    Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Kochan, Bruno; Wets, Geert
    Travel demand management (TDM) consists of a variety of policy measures that affect the effectiveness of transportation systems by changing travel behavior. The primary objective of such TDM strategies is not to improve traffic safety, although their impact on traffic safety should not be neglected. The main purpose of this study is to simulate the traffic safety impact of conducting a teleworking scenario (i.e. 5% of the working population engages in teleworking) in the study area, Flanders, Belgium. Since TDM strategies are usually conducted at a geographically aggregated level, crash prediction models (CPMs) should also be developed at an aggregate...

  5. Integrated health impact assessment of travel behaviour: model exploration and application to a fuel price increase

    Dhondt, Stijn; Kochan, Bruno; Beckx, Carolien; Lefebvre, Wouter; Pirdavani, Ali; Degraeuwe, Bart; Bellemans, Tom; Int Panis, Luc; Macharis, Cathy; Putman, Koen
    Transportation policy measures often aim to change travel behaviour towards more efficient transport. While these policy measures do not necessarily target health, these could have an indirect health effect. We evaluate the health impact of a policy resulting in an increase of car fuel prices by 20% on active travel, outdoor air pollution and risk of road traffic injury. An integrated modelling chain is proposed to evaluate the health impact of this policy measure. An activity-based transport model estimated movements of people, providing whereabouts and travelling kilometres. An emission- and dispersion model provided air quality levels (elemental carbon) and a...

  6. Verkeersveiligheid in 2015: doorrekening van een aantal maatregelen uit het Verkeersveiligheidsplan Vlaanderen

    Ariën, Caroline; Hermans, Elke

  7. Effecten van maatregelen op verkeersveiligheid in 2015 - Steunpunt verkeersveiligheid ontwikkelt rekenmodel

    Ariën, Caroline; Hermans, Elke
    Om de verkeersveiligheid verder te verbeteren kan het Vlaamse Gewest uiteenlopende maatregelen nemen. Maar welke maatregel levert daarbij het meeste op? Hoeveel verkeersslachtoffers kan een maatregel voorkomen? En weegt de winst in verkeersveiligheid voldoende op tegen de investeringskosten? In een studie van het Steunpunt Mobiliteit en Openbare Werken, spoorVerkeersveiligheid, werd een rekenmodel ontwikkeld waarmee het mogelijk is het effect van een maatregel op de verkeersveiligheid in Vlaanderen te kwantificeren wanneer een set van regionale en lokale maatregelen wordt doorgerekend.

  8. Road safety risk evaluation and target setting using data envelopment analysis and its extensions

    SHEN, Yongjun; HERMANS, Elke; BRIJS, Tom; WETS, Geert; VANHOOF, Koen
    Currently, comparison between countries in terms of their road safety performance is widely conducted in order to better understand one's own safety situation and to learn from those best-performing countries by indicating practical targets and formulating action programmes. In this respect, crash data such as the number of road fatalities and casualties are mostly investigated. However, the absolute numbers are not directly comparable between countries. Therefore, the concept of risk, which is defined as the ratio of road safety outcomes and some measure of exposure (e.g., the population size, the number of registered vehicles, or distance travelled), is often used...

  9. Translating road safety into health outcomes using a quantitative impact assessment model

    Dhondt, Stijn; Pirdavani, Ali; Macharis, Cathy; Bellemans, Tom; Putman, Koen
    Introduction The majority of traffic safety policies are limited to preventing mortality. However, non-fatal injuries also impose a significant risk of adverse health. Therefore, both mortality and morbidity outcomes should be included in the evaluation of traffic safety policies. The authors propose a method to evaluate different policy options taking into account both fatalities and serious injuries. Methods A health impact model was developed and aligned with a transport and road safety model, calculating the health impact of fatalities and seriously injured traffic victims for two transport scenarios in Flanders and Brussels (Belgium): a base scenario and a fuel price increase of 20% as an alternative. Victim counts were expressed as disability adjusted life...

  10. Application of Different Exposure Measures in Developing Planning-level Zonal Crash Prediction Models

    Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Kochan, Bruno; Wets, Geert
    Assessing the safety impacts of Travel Demand Management (TDM) policies is essential to be carried out by means of a proactive approach. Since TDM policies are typically implemented at an aggregate level, Crash Prediction Models (CPMs) should also be developed at a similar level of aggregation. These models should match better with the resolution at which TDM evaluations are performed. Therefore Zonal Crash Prediction Models (ZCPMs) are considered to construct the association between observed crashes and a set of predictor variables in each zone. This is carried out by the Generalized Linear Modeling (GLM) procedure with the assumption of Negative...

  11. Evaluatie signalisatieplan bedrijventerrein ???Poort Genk???. Uitgevoerd in opdracht van Agentschap Wegen en Verkeer (AWV) Limburg.

    Brijs, Kris; Ari??n, Caroline; Brijs, Tom; Van Vlierden, Karin; Kuppens, Johan; Van der Linden, Max
    Op vraag van AWV-Limburg hebben de drie partners voor de Signalisatiesimulator - Connect, iNFRANEA en IMOB - een project opgezet om de signalisatie naar en op de industriezone Poort Genk te simuleren en te testen. Het betreft nieuwe of aangepaste signalisatie waarbij AWV-Limburg twee welbepaalde signalisatie concepten wilde laten onderzoeken. Er werden voor dit onderzoek chauffeurs van vrachtwagens, bestelwagens en personenwagens betrokken. Zij voerden testen uit in de signalisatiesimulator opdat de geselecteerde signalisatieconcepten grondig onderzocht konden worden.

  12. Signalisatiesimulatie Werken Aan R7 Viaduct te Vilvoorde. Uitgevoerd in opdracht van Agentschap Wegen en Verkeer (AWV) Vlaams Brabant.

    Brijs, Kris; Ariën, Caroline; Brijs, Tom; Van Vlierden, Karin; Kuppens, Johan; Van der Linden, Max

  13. Driving behavior at transitions from highway to secondary roads: A simulator study

    Ariën, Caroline; Brijs, Kris; Ceulemans, Wesley; Jongen, Ellen M.M.; Daniels, Stijn; Brijs, Tom; Wets, Geert
    This study will investigate the transition from highways to secondary roads. Such transitions require suitable design in order to evoke a mental and behavioral 'reset' in the driver. Two driving simulator studies(60 participants each) are executed to examine the effect of two possible 'reset' moments:(1)the highway exit and (2)the intersection at the junction of the highway exit and the secondary road. In the first experiment four highway exit designs are investigated: (a) straightforward and curved with overall deflection of (b) 45°, (c) 90° and (d) 180°. The junction with the secondary road is a priority intersection. During the second experiment...

  14. The relation between executive functioning and risky driving in young novice drivers

    Ross, Veerle; Jongen, Ellen M.M.; Brijs, Tom; Ruiter, Rob; Brijs, Kris; Komlos, Marcell; Wets, Geert
    Driving is a highly complex task demanding higher behavioral control abilities. Young drivers are involved in a disproportionately large numberof crashes. Lack of driving experience certainly helps to explain the high accident incidence of young drivers. As a first step, this study aimed to investigate whether executive functioning is related to risky driving in young novice drivers. Thirty-eight drivers(17-25 years, max. 12 months driving experience) completed a 25km-drive. Measures of risky driving were: standard deviation of lateral position, detection time of, reaction time to, and collisions with road hazards, speeding, yellow and red light running, and head distance. Executive functions...

  15. Evaluating the effectiveness of a post-license education program for young novice drivers

    Brijs, Kris; Ruiter, Rob; Wang, Weixin; Brijs, Tom

  16. Beyond summarized measures: Predictability of specific measures of simulated driving by specific physical and psychological measures in older drivers

    Jongen, Ellen; Brijs, Tom; Brijs, Kris; Lutin, Mark; Cuenen, Ariane; Van Vlierden, Karin; Wets, Geert

  17. Optimizing the implementation of policy measures through social acceptance segmentation

    Cools, Mario; Brijs, Kris; Tormans, Hans; De Laender, Jessie; Wets, Geert
    This paper proposes Q-methodology as a technique for the identification of more homogenous subgroups or 'segments' within a rather heterogeneous overall population whenit comes to social acceptance of demand-restricting policy measures. Identification of such segments would allow policy makers to better tailor their future actions and thereby increase the chance for a succesful implementation of the measures they propose. A set of 33 persons, selected in function of age, gender and car ownership evaluated the acceptability of a number of 42 demand-restricting policy measures. Special care was taken care that the final set of statements covered the four classically distinguished...

  18. Evaluating the Road Safety Effects of a Fuel Cost Increase Measure by means of Zonal Crash Prediction Modeling

    Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Kochan, Bruno; Wets, Geert
    Travel Demand Management(TDM) consists of a variety of policy measures that affect the transportation system's effectiveness by changing travel behavior. The primary objective to implement such TDM strategies is not to improve traffic safety, although their impact on traffic safety should not be neglected. The main purpose of this study is to evaluate the traffic safety impact of conducting a fuel-cost increase scenario (i.e increasing the fuel price by 20%) in Flanders, Belgium. Since TDM strategies are usually conducted at an aggregate level, crash prediction models (CPMs) should also be developed at a geographically aggregated level. Therefore zonal crash prediction...

  19. Application of Zonal Crash Prediction Models in Traffic Safety Evaluation of a Fuel-Cost Increase Scenario Using an Activity-Based Transportation Model

    Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Kochan, Bruno; Wets, Geert
    Travel Demand Management (TDM) consists of a variety of policy measures that affect the transportation system's effectiveness by changing travel behavior. The primary objective to implement such TDM strategies is not to improve traffic safety; however, their potential in providing traffic safety profits should not be neglected. The main purpose of this study is to evaluate the traffic safety impacts of conducting a fuel-cost scenario in Flanders, Belgium. While travel demand management strategies are usually conducted at an aggregated level, Crash Prediction Models (CPMs) should also be developed at a more aggregated level. Therefore Zonal Crash Prediction Models (ZCPMs) are...

  20. Developing Zonal Crash Prediction Models with a Focus on Application of Different Exposure Measures

    Pirdavani, Ali; Brijs, Tom; Bellemans, Tom; Kochan, Bruno; Wets, Geert
    Assessing the safety impacts of Travel Demand Management (TDM) policies is essential to be carried out by means of a proactive approach. Since TDM policies are typically implemented at an aggregate level, Crash Prediction Models (CPMs) should also be developed at a similar level of aggregation. These models should match better with the resolution at which TDM evaluations are performed. Therefore Zonal Crash Prediction Models (ZCPM's) are considered to construct the association between observed crashes and a set of predictor variables in each zone. This is carried out by the Generalized Linear Modeling (GLM) procedure with the assumption of Negative...

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