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Low-Cost Safety Improvements Using HSIS Data 

This presentation is Part II of a presentation at the 2017 Traffic Records Forum that discussed the findings from evaluations of low-cost safety improvements conducted as part of the FHWA Evaluation of Low-Cost Safety Improvements Pooled Fund Study.  The presentation will concentrate on how crash, roadway, and traffic volume data from the Highway Safety Information System (HSIS) and other related databases are used to evaluate safety improvements. State experience implementing related countermeasures will be highlighted. 

Evaluating the Safety Impact of Intersection Sight Distance 

This presentation will present the findings of an NCHRP study to understand the safety impact of intersection sight distance at two-way stop-controlled intersections.  A large study was conducted using sight distance observations from nearly 1,000 intersections in Ohio, North Carolina, and Washington together with roadway characteristics and crash occurrence to understand the relationship between the features of the intersection, the sight distance, and the likelihood of a crash.   The study used Highway Safety Information System (HSIS) data including crash, roadway, and volume data together with the field collected data to develop models to represent the relationship between sight distance and crashes.  The resulting information is presented in simple to use charts that state and local practitioners can use to understand and compare potential changes to sight distance at a given intersection. 

Carol Tan - has been a Highway Research Engineer with the Federal Highway Administration in the Office of Safety Research & Development for over 25 years.  Dr. Tan managed the FHWA’s Pedestrian and Bicycle Safety Research Program from 1991 to 2002.  Since 2002, she has been the Team Leader for the Safety Data and Analysis Team which manages the Highway Safety Information System (HSIS), the Safety Training and Analysis Center (STAC), the Development of Crash Modification Factors (DCMF) program, and FHWA’s Motorcycle Safety research.

Frank Gross, P.E., - is a Senior Project Manager at VHB with over 15 years of diverse transportation research and engineering experience. As a safety researcher, he specializes in data analysis and the development of information to support national safety management tools such as the Highway Safety Manual. He has implemented a variety of statistical techniques to understand crash contributing factors and to estimate the effects of numerous safety strategies. As a safety engineer, he implements and promotes the use of these national tools, supporting state and local agencies with their highway safety programs.


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