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Accession Number PB2014-106891
Title Comparing Crash Trends and Severity in the Northern Rocky Mountain Region.
Publication Date Aug 2012
Media Count 133p
Personal Author B. Andereen K. Ksaibati
Abstract Safety Management Systems are federally mandated in an effort to encourage states to develop strategic programs in order to mitigate severe crashes. In 2006, the Wyoming Department of Transportation (WYDOT) published the Wyoming Strategic Highway Safety Plan (SHSP). The plan outlines goals for the state and transportation areas of strategic emphasis. While the SHSP has proven successful in lowering crash rates, Wyoming is constantly plagued by one of the highest fatal crash rates in the region. In the northern Rocky Mountain region, North Dakota historically boasts the lowest fatal crash rates, while Colorado has the highest. Other states in the region are Wyoming, Montana, Utah, South Dakota, and Idaho. In an effort towards continued safety improvement, WYDOT is investigating whether there is a link between certain factors in North Dakota and the low number of fatal crashes experienced there. The basis of this research centers on evaluating key differences between North Dakota and Wyoming to determine if there are policies, practices, and or physical differences that keep North Dakota's fatal crash rate lower. This research investigates patrol enforcement differences, traffic safety laws, crash records, mileage records, vehicle records, and economic factors as possible sources of crash rate differences. When some critical factors were identified, Logistic Regression Modeling was applied to two Wyoming interstates to identify safety concerns for implementation within Wyoming's transportation SHSP. It was found that on Interstates 80 and 25 in Wyoming, sobriety, motorcycle usage, and speed were some of the largest factors in increasing the probability of a critical crash. From comparing crash trends between the two states, it was found that interstates are an area where fatal crashes happen more often in Wyoming.
Keywords Accident investigations
Accident severity
Crash rates
Drinking drivers
Economic factors
Highway safety
Motor vehicle accidents
Northern Rocky Mountain Region
Program evaluation
Regression analysis
Traffic law enforcement

Source Agency Federal Highway Administration
NTIS Subject Category 85D - Transportation Safety
85H - Road Transportation
43G - Transportation
91B - Transportation & Traffic Planning
Corporate Author Wyoming Univ., Laramie. Dept. of Civil and Architectural Engineering.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1418
Contract Number N/A

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