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Author: Joshua Daniel Gibbons Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 128
Book Description
This research focuses on the development of the Utah Intersection Crash Prediction Model (UICPM) and the Intersection Safety Analysis Methodology (ISAM). The UICPM is a Bayesian generalized linear model that determines crash distributions for each intersection based on roadway characteristics and historical crash data. The observed number of crashes at each intersection is compared with the crash distribution, and a percentile value is calculated as the probability that the number of crashes occurring at an intersection in a particular year is less than or equal to the average annual number of crashes. A high percentile value indicates that more crashes were observed than expected and the intersection is a hot spot and should be considered for safety improvements. All intersections are ranked at the state, UDOT Region, and county levels based on the percentile value, the higher ranks having higher percentile values.
Author: Joshua Daniel Gibbons Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 128
Book Description
This research focuses on the development of the Utah Intersection Crash Prediction Model (UICPM) and the Intersection Safety Analysis Methodology (ISAM). The UICPM is a Bayesian generalized linear model that determines crash distributions for each intersection based on roadway characteristics and historical crash data. The observed number of crashes at each intersection is compared with the crash distribution, and a percentile value is calculated as the probability that the number of crashes occurring at an intersection in a particular year is less than or equal to the average annual number of crashes. A high percentile value indicates that more crashes were observed than expected and the intersection is a hot spot and should be considered for safety improvements. All intersections are ranked at the state, UDOT Region, and county levels based on the percentile value, the higher ranks having higher percentile values.
Author: Camille Cherie Lunt Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
This research also includes modifications made to the Intersection Safety Analysis Methodology (ISAM) which focuses exclusively on intersection-related crashes. The modifications made to the ISAM mirror the abilities of the CAMS, thus allowing the pair of methodologies to analyze the entire state route network without overlapping any crash data.
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety Publisher: ISBN: Category : Roads Languages : en Pages : 560
Author: Joshua Daniel Gibbons
Author: Joshua Daniel Gibbons
Author: Wayne D. Cottrell
Author: Utah. Public Safety Commission
Author: Camille Cherie Lunt
Author: Utah. Highway Safety Division
Author: Utah. State Department of Highways. Highway Safety Division
Author: Utah. Highway Safety Division
Author: American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Author: Utah. Highway Safety Office
Author: Utah Safety Council