David R. Ragland PhD, MPH

Director, UC Berkeley Safe Transportation Research and Education Center (SafeTREC)
Adjunct Professor Emeritus, Epidemiology
Research Interests: 
  • Injury epidemiology (intentional and unintentional)
  • Injuries in vulnerable roads users (pedestrians, bicyclists, motorcyclists)
  • Interaction of behavioral and environmental factors in injury
  • Demographic/social/cultural factors in injury patterns
  • Firearm injury (epidemiology, policy, prevention)
Selected Publications: 

Jacobsen, Peter L; Ragland, David R; Komanoff, C. Safety in Numbers for walkers and bicyclists: exploring the mechanisms. Inj Prev 2015;21:4 217-220

MacLeod, Kara E; Karriker-Jaffe, Katherine J; Ragland, David R; Satariano, William A; Kelley-Baker, Tara; Lacey, John H. Acceptance of drinking and driving and alcohol-involved driving crashes in California. Accident Analysis & Prevention, Volume 81, 2015, pp 134-142

Zhang, Yuanyuan; Bigham, John; Ragland, David; Chen, Xiaohong. Investigating the associations between road network structure and non-motorist accidents. Journal of Transport Geography, Volume 42, 2015, pp 34-47

Ragland, David R; Bigham, John; Oum, Sang Hyouk; Chen, Katherine; Felschundneff, Grace. Traffic Injury on Tribal Lands in California. Transportation Research Board 94th Annual Meeting, Transportation Research Board, 2015, 10p

MacLeod, Kara E; Satariano, William A; Ragland, David R. The impact of health problems on driving status among older adults. Journal of Transport & Health, Volume 1, Issue 2, 2014, pp 86-94

Zhang, Yuanyuan; Proulx, Frank; Ragland, David; Schneider, Robert; Grembek, Offer. Develop a Plan to Collect Pedestrian Infrastructure and Volume Data for Future Incorporation into Caltrans Accident Surveillance and Analysis System Database. University of California, Berkeley; California Department of Transportation, 2014, 110p

Grembek, Offer; Bosman, Craig; Bigham, John M; Fine, Sara; Griswold, Julia B; Medury, Aditya; Sanders, Rebecca L; Schneider, Robert J; Yavari, Afsaneh; Zhang, Yuanyuan; Ragland, David R. Pedestrian Safety Improvement Program. University of California, Berkeley; California Department of Transportation, 2014, 272p

Grembek, Offer; Medury, Aditya; Orrick, Phyllis; Leung, Katherine; Ragland, David R; Loukaitou-Sideris, Anastasia; Fink, Camille N Y; Resnick, Justin; Wong, Norman; Shafizadeh, Kevan; Khan, Ghazan. A Comparative Analysis of Pedestrian and Bicyclist Safety Around University Campuses.  University of California, Berkeley; University of California, Berkeley; University of California, Los Angeles; California State University, Sacramento; California Department of Transportation; Research and Innovative Technology Administration, 2014, 180p

Li, Zhibin; Ahn, Seongchae; Chung, Koohong; Ragland, David R; Wang, Wei; Yu, Jeong Whon. Surrogate safety measure for evaluating rear-end collision risk related to kinematic waves near freeway recurrent bottlenecks. Accident Analysis & Prevention, Volume 64, Issue 0, 2014, pp 52-61

Ragland, David R; Pande, Swati; Bigham, John; Cooper, Jill F. Examining Long-Term Impact of California Safe Routes to School Program: Ten Years Later. Transportation Research Record: Journal of the Transportation Research Board, Issue 2464, 2014, pp 86–92.


Director of the UC Berkeley Safe Transportation Research and Education Center (SafeTREC), a joint project of the Institute of Transportation Studies and the School of Public Health. The Center's mission is reducing traffic-related injury through teaching, outreach, technical assistance, and research.

Other interests: 
  • Technical Advisory Committee, UrbanFootprint Public Health Module, Governor's Office of Planning and Research
  • Advisory Committee, Crash Medical Outcomes Data (CMOD), California Department of Public Health
  • Executive Committee, Institute of Transportation Studies, UC Berkeley
  • Data Technical Advisory Team, California Strategic Highway Safety Plan (SHSP)
  • California Pedestrian Advisory Committee (CALPED)