Search results for "Crash frequency"

showing 3 items of 3 documents

Bicycle Rider Behavior and Crash Involvement in Australia.

2021

This research investigated how behaviours and attitudes of bicycle riders influence crash frequency and severity. The study recruited 1102 Australian bicycle riders for an online survey. The survey comprised questions on demographics, frequency of riding and the number and severity of traffic crashes during the last five years. The survey included the Cycling Behaviour Questionnaire and the Cyclist Risk Perception and Regulation Scale. Overall, there were low levels of errors and violations reported by participants indicating that these behaviours were on average never or rarely exhibited while riding a bicycle. Conversely, participants reported high levels of engagement in positive behavio…

212 Civil and construction engineeringcyclingDemographicsCrash severityHealth Toxicology and Mutagenesismedia_common.quotation_subjectlcsh:MedicineCrashArticle03 medical and health sciences0302 clinical medicinePromotion (rank)Surveys and Questionnaires0502 economics and businessHumans030212 general & internal medicinemedia_common050210 logistics & transportationlcsh:R05 social sciencesPublic Health Environmental and Occupational HealthAccidents TrafficAustraliabehaviourBicyclingRisk perceptionAttitudeCrash frequencyScale (social sciences)road safetyPsychologyhuman activitiesDemographyInternational journal of environmental research and public health
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Capacity and safety analysis of hard-shoulder running (HSR). A motorway case study

2016

Abstract Operational motorway conditions can be improved by introducing traffic flow management and control systems, such as ramp metering (RM), high occupancy vehicle (HOV) lanes, real-time variable speed limits (VSLs), reversible lanes (RL), automated highway systems (AHS) and hard-shoulder running (HSR). The effects of such devices need to be examined in terms of capacity and safety. This paper examines the case study of the Italian motorway A22, which is supposed to be equipped with an HSR system implemented along 128 km in order to reduce congestion with consequent improvement in levels of service (LOS). We studied the traffic processes (capacity, flow distribution between lanes, relia…

EngineeringFlow distributionReliability (computer networking)Aerospace EngineeringTransportation010501 environmental sciencesManagement Science and Operations Research01 natural sciencesAutomotive engineering0502 economics and businessSettore ICAR/04 - Strade Ferrovie Ed AeroportiMetering modeHighway Safety ManualHSM0105 earth and related environmental sciencesCivil and Structural Engineering050210 logistics & transportationHard-shoulder runningCapacitybusiness.industryLevel of serviceSpeed limit05 social sciencesReliabilityVariable speed limitCrash frequencyControl systemBusiness Management and Accounting (miscellaneous)Safetybusiness
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Improving reliability of road safety estimates based on high correlated accidents counts

2007

Calibrating a safety performance function (SPF) with many years of accident data creates a temporal correlation that traditional model calibration procedures cannot deal with. It is well known that generalized estimating equations (GEE) models are able to incorporate trends into accident data and thus overcome difficulties in accounting for correlation; the usual application of GEEs to safety analysis uses robust (or sandwich) estimates of regression coefficients under the independence hypothesis for the working correlation matrix. This practice is justified by the robustness of the GEE procedure against misspecification of the response correlation structure. Nevertheless, with this method,…

Highway accidents Accident prevention crash frequency
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