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- W65872913 abstract "Safety network screening is used to identify road locations (particularly intersections and roadway segments) which exhibit an abnormally high number of expected collisions or an unusually high proportion of a certain configuration of collisions. The current state-of-the-art network screening methods rely on safety performance functions (SPFs) that require traffic volume as an input, but many cities in Canada, including the City of Saskatoon, do not collect traffic volume for every single segment within the city limits. Lack of traffic volume data for a study network severely restricts the applicability of a SPF-based network screening method. The binomial and the beta-binomial tests, however, are formal collision diagnosis tests that can be used to screen roadway networks that include roadway segments for which traffic volume data are not available. Unfortunately, previous studies have applied these two collision diagnosis tests without explicitly defining the circumstances that indicate which test is preferable. This study uses a formal statistical test known as the “overdispersion test” to determine when there is a need to apply the beta-binomial test instead of the binomial test to screen a roadway network. The study targeted uncontrolled major arterial segments in Saskatoon using five years (2005-2009) of collision data for the two most frequent collision configurations: rear end collision and side swipe same direction collision. The authors used ArcGIS to develop collision maps that visually display the screening results. The collision map will facilitate the governing agencies’ decision-making processes when selecting appropriate safety countermeasures to reduce target collision configurations at screened locations." @default.
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- W65872913 date "2012-01-01" @default.
- W65872913 modified "2023-09-24" @default.
- W65872913 title "Identifying High Collision Locations Without Traffic Volume Data" @default.
- W65872913 hasPublicationYear "2012" @default.
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