eprintid: 20155
rev_number: 16
userid: 2893
dir: disk0/00/02/01/55
datestamp: 2014-01-29 15:09:09
lastmod: 2016-11-15 14:16:06
status_changed: 2014-01-29 15:09:09
type: thesis_degree
metadata_visibility: show
contact_email: legend3108@gmail.com
item_issues_count: 0
eprint_status: archive
creators_name: YANG, XINYI
creators_email: xiy40@pitt.edu
creators_id: XIY40
title: A Service Life Analysis of Roundabouts Retrofits for Signalized Intersections
ispublished: unpub
divisions: sch_eng_civilenvironmental
full_text_status: public
keywords: roundabout, retrofits, benefit-cost
abstract: Roundabouts have long been regarded as an effective traffic control method. While this method is quite popular in some foreign countries like Australia, there are not as many existing roundabout sites in the U.S. According to foreign experiences and limited experience in the U.S., roundabouts can be good replacement alternatives where signalized intersections no longer function well. 
This thesis examined and monetized the potential benefits of converting signalized intersections to roundabouts under three different circumstances. To be specific, the potential benefits included crash reduction, delay time reduction, fuel efficiency improvement and air pollutant reduction. Then a benefit-cost analysis (BCA) was conducted. The monetization of environmental benefits was used to improve the BCA methodology that has been used by others. Three different intersections, that are currently signalized, were studied to determine the BCA. After a systematic evaluation, it was found that a five-way intersection with moderate traffic volume had the best benefit-cost ratio among all three intersections studied.
date: 2014-01-29
date_type: published
pages: 101
institution: University of Pittsburgh
refereed: TRUE
etdcommittee_type: thesis_advisor
etdcommittee_type: committee_member
etdcommittee_type: committee_member
etdcommittee_name: Casson, Leonard
etdcommittee_name: Magalotti, Mark
etdcommittee_name: Johnson, Keith 
etdcommittee_email: casson@pitt.edu 
etdcommittee_email: mjm25@pitt.edu 
etdcommittee_email: keith.a.johnson@urs.com
etdcommittee_id: CASSON
etdcommittee_id: MJM25
etdcommittee_id: 
etd_defense_date: 2013-11-25
etd_approval_date: 2014-01-29
etd_submission_date: 2013-12-02
etd_release_date: 2014-01-29
etd_access_restriction: immediate
etd_patent_pending: FALSE
thesis_type: thesis
degree: MS
citation:   YANG, XINYI  (2014) A Service Life Analysis of Roundabouts Retrofits for Signalized Intersections.  Master's Thesis, University of Pittsburgh.    (Unpublished)  
document_url: http://d-scholarship-dev.library.pitt.edu/20155/4/xinyi_etd2013.pdf