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Safety Impacts of Push-Button and Countdown Timer on Nonmotorized Traffic at Intersections
Joint Authors
Zhou, Bei
Roshandeh, Arash M.
Zhang, Shengrui
Source
Mathematical Problems in Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-09-25
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
This paper applies the random parameters negative binominal model to investigate safety impacts of push-button and countdown timer on pedestrians and cyclists at urban intersections.
To account for possible unobserved heterogeneity which could vary from one intersection to another, random parameters model is introduced.
A simulation-based maximum likelihood method using Halton draws is applied to estimate the maximum likelihood of random parameters in the model.
Dataset containing pedestrians’ and cyclists’ crash data of 1,001 intersections from Chicago is utilized to establish the statistical relationship between crash frequencies and potential impact factors.
LIMDEP (Version 9.0) statistical package is utilized for modeling.
The parameter estimation results indicate that existence of push-button and countdown timer could significantly reduce crash frequencies of pedestrians and cyclists at intersections.
Increasing number of through traffic lanes, left turn lanes, and ratio of major direction AADT to minor direction AADT, tend to increase crash frequencies.
Annual average daily left turn traffic has a negative impact on pedestrians’ safety, but its impact on cyclists’ crash frequency is statistically insignificant at 90% confidence level.
The results of current study could provide important insights for nonmotorized traffic safety improvement projects in both planning and operational levels.
American Psychological Association (APA)
Zhou, Bei& Roshandeh, Arash M.& Zhang, Shengrui. 2014. Safety Impacts of Push-Button and Countdown Timer on Nonmotorized Traffic at Intersections. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-6.
https://search.emarefa.net/detail/BIM-1044276
Modern Language Association (MLA)
Zhou, Bei…[et al.]. Safety Impacts of Push-Button and Countdown Timer on Nonmotorized Traffic at Intersections. Mathematical Problems in Engineering No. 2014 (2014), pp.1-6.
https://search.emarefa.net/detail/BIM-1044276
American Medical Association (AMA)
Zhou, Bei& Roshandeh, Arash M.& Zhang, Shengrui. Safety Impacts of Push-Button and Countdown Timer on Nonmotorized Traffic at Intersections. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-6.
https://search.emarefa.net/detail/BIM-1044276
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1044276