Traffic Safety Meta-Analysis of Reversible Lanes

In this study, a meta-analysis was performed to review the potential effects of reversible lanes on traffic safety. After a systematic literature review, ten U.S studies were selected for inclusion in the analysis. These studies employed either a simple before-after comparison or a cross-sectional comparison methodology. Study results were extracted by transforming the collision rates and frequencies of these studies into a log-odds ratio. The results of the meta-analysis suggest that a 30.9% increase in total collisions is expected. Property-damage-only collisions are expected to increase by 16.6% and injury collisions are expected to increase by 34.9%. Peak period collisions are expected to increase by 46.2%, while off-peak period collisions are expected to increase by 12.8%. The results were significant, with the exception of the off-peak period collision result. A meta-regression was performed, which regress variables related to study type, collision type and operational characteristics of the study locations on the extracted log odds ratio. It was found that peak period operations were positively and significantly correlated with an increase in crashes. Study quality as observed through the study type variable was found to be a significant variable. Presence of left-turn restrictions was negatively correlated and significant, suggesting that application of a left-turn restriction can improve the safety of reversible lanes. The presence of delineator/barrier was generally negatively correlated, and both the presence of dynamic traffic control and static traffic control were generally positively correlated. Topics of time/study age trends and transferability were also discussed.

Name thesis:degree_name

Master of Science (MSc)

Discipline thesis:degree_discipline

Engineering – Civil

Grantor dc:publisher.institution

Schulich School of Engineering

Year dc:date.issued

2019

Author dc:creator

• Manuel, Aaron

Advisors dc:contributor.advisor

• De Barros, Alexandre Gomes
• Tay, Richard

Committee members dc:contributor.committeemember

• Kattan, Lina
• Sadeghpour, Farnaz

Statement dc:rights

• University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.

DOI

http://dx.doi.org/10.11575/PRISM/36793

OAI identifier oai:identifier

oai:ucalgary.scholaris.ca:1880/110697