Crash cushion selection criteria

dc.contributor.advisor Peter T. Savolainen
dc.contributor.author Barnwal, Ashirwad
dc.contributor.department Civil, Construction, and Environmental Engineering
dc.date 2019-09-21T08:18:34.000
dc.date.accessioned 2020-06-30T03:16:14Z
dc.date.available 2020-06-30T03:16:14Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 2017
dc.date.embargo 2019-07-20
dc.date.issued 2017-01-01
dc.description.abstract <p>Crash cushions are used as a roadside safety treatment alternative to protect errant vehicles from striking potentially hazardous roadside fixed objects. A variety of crash cushion designs, with varying characteristics, are available for use by transportation agencies. The choice of an optimum cushion type in consideration of safety performance and economic viability at any given highway location depends on several factors. This research study aims to quantify the life cycle costs of different crash cushion systems installed across the state of Iowa and to develop guidance to help decide where and when to install specific types of cushions. A probability-based tool, the Roadside Safety Analysis Program, was used to estimate the frequency of run-off-the-road collisions under different scenarios for one-way, undivided, and divided highway facilities. The estimated impact frequency based on pertinent inputs was then used as a decision criteria to select the most appropriate cushion category. Two general crash cushion categories were defined. These included redirective cushions with higher installation and lower repair costs and redirective cushions with lower installation and higher repair costs. The life cycle cost comparison indicated that the low-installation/high-repair category was optimum until an impact frequency of approximately 0.08 per year, beyond that value, high-installation/low-repair tended to be more cost-effective.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/etd/17144/
dc.identifier.articleid 8151
dc.identifier.contextkey 15015855
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath etd/17144
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/31327
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/etd/17144/Barnwal_iastate_0097M_16668.pdf|||Fri Jan 14 21:17:14 UTC 2022
dc.subject.disciplines Civil Engineering
dc.subject.disciplines Transportation
dc.subject.keywords Benefit-cost analysis
dc.subject.keywords Crash cushions
dc.subject.keywords Impact attenuators
dc.subject.keywords RSAP
dc.title Crash cushion selection criteria
dc.type article
dc.type.genre thesis
dspace.entity.type Publication
thesis.degree.discipline Civil Engineering
thesis.degree.level thesis
thesis.degree.name Master of Science
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