larson institute transportation operations program safety research paul p jovanis professor emeritus...
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Larson InstituteTransportation Operations Program Safety Research
Paul P Jovanis Professor EmeritusEric Donnell Associate Professor
Larson Institute interests lie in analysis of safety
challenges• Road Safety Analysis – fundamental
analysis challenges– State-level crash and roadway inventory
data– Study-specific operations data (e.g. speed),
especially related to geometric elements or safety problems
– NDS data, including those beyond SHRP 2• Human factors studies on test track and
simulators
Program possesses breadth and depth in road safety
research• Significant activity by multiple faculty in application of statistical
methods to road safety• FHWA, NCHRP, PennDOT, WashDOT, NYCDOT among sponsors• Research started in early 2000’s prior to advent of Highway
Safety Manual Research Program
Active research team includes:
• Eric Donnell• Vikash Gayah• Paul Jovanis• Martin
Pietrucha• Venky Shankar• Philip Garvey• Numerous graduate students
Frank Gross VHB AssociatesRJ Porter University of UtahKen Wu NCTU TaiwanJonathan Aguero-Valverde University of Costa RicaScott Himes VHB AssociatesWen Hu IIHS
Sub-specialty: Road Safety Analysis
• Pioneering research on application of count regression to road safety (Jovanis, Shankar)
• Crashes on roads a fundamental spatial phenomenon, yet rarely take advantage of this attribute in safety analysis (Donnell, Hu, Jovanis, Aguero-Valverde)
• Identification and use of comparison site data in evaluation of safety countermeasure effectiveness (Gross, Jovanis, Donnell, Sasidharan)
Numerous studies support Highway Safety Manual development and use
• Development of crash modification factors for specific treatments - Donnell
• Develop methods for crash modification factor estimation – Jovanis, Donnell
• Developing Safety Performance Functions – Donnell, Gayah, Jovanis
• Simultaneous modeling of crash frequency and severity – Jovanis and Aguero
Several studies at interface of safety, operations and design
• Development of a Crash Modification Factor for Application of Safety EdgeSM on Two-lane Rural Highways – Donnell
• Entry Control Facility Geometric Criteria – Donnell, Brennan
• Safety Evaluation of Continuous Green-T Intersection – Donnell
• Reducing Roadway Departure Crashes at Horizontal Curve Sections on Two-lane Rural Highways - Donnell
Driver visual perception is an area of active research
• Evaluating the Clearview Typeface System for Negative Contrast Signs - Garvey and Pietrucha
• The Development of Optimal On-premise Electronic Message Center (EMC) Lighting Levels and Sign Lighting Measurement Techniques – Garvey and Pietrucha
• Modeling the Dynamics of Driver’s Dilemma Zone Perception using Machine Learning Methods for Safer Intersection Control - Garvey
Naturalistic driving study (NDS) data analysis is a strength
• Methodological paradigms in NDS– Shankar and Jovanis
• Effects of omitted variable bias on crash analysis with NDS – Wu, Aguero, Jovanis and Shankar
• Relationship between crashes and near crashes – Wu and Jovanis
• Screening Naturalistic Driving Study Data – Wu and Jovanis
• NDS SHRP 2 Central PA. data collection site – Jovanis, Rado, many others
But life is not as simple as it seems . . .
Larson Institute interests lie in analysis of safety
challenges• Road Safety Analysis – fundamental
analysis challenges– State-level crash- spatial correlation;
identification of comparison groups – Study-specific operations data (e.g. speed),
especially related to geometric elements or safety problems
– NDS data, including those beyond SHRP 2• Human factors studies on test track and
simulators
