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Safety Evaluation of a Shared Bus-Bike Lane (SBBL) using Video Recorded Conflict Data

Martins Cavalcante de Macedo, Mateus (2020) Safety Evaluation of a Shared Bus-Bike Lane (SBBL) using Video Recorded Conflict Data. Master's Thesis, University of Pittsburgh. (Unpublished)

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Focusing on promoting sustainable transportation, cities such as Pittsburgh have been implementing infrastructures to move alternative modes such as transit and bicycles. However, limited by the current road framework which focus on automobiles, decision makers have to creatively retrofit the streets to accommodate these modes. This dissertation research analyzes a newly-implemented Contra-Flow Shared Bus-Bike Lane (SBBL) in Downtown Pittsburgh and evaluates the safety level for cyclists by scrutinizing video data recorded for 192 hours in several corridor intersections. The evaluation compares the SBBL with the opposite General lane and it is based on both the amount of interactions that a cyclist had with a motor vehicle and number of instances that a cyclist did an unwanted maneuver.

Multiple conclusions could be taken from this study. Mainly, the safety benefits of a SBBL for the cyclists are palpable, as the conflict rate between cyclists that interact with motor vehicles against the total number of cyclists recorded goes down to half (42.84% interacted with vehicles the general lane while only 18.10% cyclists in SBBL had to interact with a bus). Regarding undesirable movements that may put the cyclists and/or others at risk, the SBBL cyclists did have higher rates (17.40% of all SBBL cyclists performed a high-risk maneuver vs. 8.82% General Lane’s cyclists) however those number are interpreted as related to connectivity issues between the Smithfield corridor and another bike infrastructure.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Martins Cavalcante de Macedo, Mateusmam753@pitt.edumam753
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Thesis AdvisorMagalotti, Markmjm25@pitt.edumjm25
Committee ChairJohnson, Keithkaj8@pitt.edukaj8
Committee MemberStevanovic, Aleksandarstevanovic@pitt.edustevanovic
Date: 28 January 2020
Date Type: Publication
Defense Date: 7 November 2019
Approval Date: 28 January 2020
Submission Date: 6 November 2019
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Number of Pages: 155
Institution: University of Pittsburgh
Schools and Programs: Swanson School of Engineering > Civil and Environmental Engineering
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: Traffic; Transportation; Shared Bus-Bike Lane; SBBL; Bus; Bicycle; Conflict; Safety
Date Deposited: 28 Jan 2020 17:06
Last Modified: 28 Jan 2020 17:06


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