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EARNED DEGREES
M.P.H., 2007 (May)    
University of California, Berkeley
Epidemiology/Biostatistics

A.B., 2003 (June)     
University of Chicago
Biology; Minor: Visual Art

RESEARCH INTERESTS

• Pedestrian and bicyclist safety and mobility
• Impaired driving
• Teenage drivers
• The role of human behavior in traffic safety
• Safety Culture and the potential to change human behavior
• Traffic safety education: design and evaluation
• Evaluation of specialized enforcement programs

CURRENT OR RECENT PROJECTS

Identifying Factors that Determine Bicyclist and Pedestrian-Involved Collision Rates and Bicyclist and Pedestrian Demand at Multi-Lane Roundabouts
Sponsor: California Department of Transportation

Estimating Pedestrian Accident Exposure
Sponsor: California Department of Transportation

Alameda County Pedestrian and Bicycle Counting Project
Sponsor: Alameda County Transportation Improvement Authority/California Department of Transportation

An In-Depth Examination of Pedestrian-Involved Hit-and-Run Crashes
Sponsor: National Highway Traffic Safety Administration (subcontractor to Booz Allen Hamilton)

Evaluate the Causes of Pedestrian and Bicyclist Traffic Fatalities and Injuries, and Establish Appropriate Countermeasures for Use in California
Sponsor: California Department of Transportation

SELECTED PUBLICATIONS
Bui H, Arnold LS, Cooper JF, Ragland DR. Teens and Driving in California: Summary of Research and Best Practices. (August 1, 2006). UC Berkeley Traffic Safety Center. Paper UCB-TSC-RR-2006-1.

Diogenes M, Greene-Roesel R, Arnold LS, Ragland D. Pedestrian Counting Methods at Intersections: A Comparative Study. In Transportation Research Record: Journal of the Transportation Research Board, Transportation Research Board of the National Academies, Washington, D.C., 2007, 26-30.

Schneider RJ, Arnold LS, Ragland D.  Methodology for Counting Pedestrians at Intersections: Using Automated Counters to Extrapolate Weekly Volumes from Short Manual Count. Pending publication in Transportation Research Record: Journal of the Transportation Research Board, Transportation Research Board of the National Academies, Washington, D.C., 2009.

Schneider RJ, Arnold LS, Ragland D. Pilot Model for Estimating Pedestrian Intersection Crossing Volumes. Pending publication in Transportation Research Record: Journal of the Transportation Research Board, Transportation Research Board of the National Academies, Washington, D.C., 2009.

Professional Acitivities

Member of California Department of Transportation District 4 Pedestrian Advisory Committee