Publications

Title Author Year Publication type
Vehicle Occupancy and Crash Risk Geyer, Judy A.; Ragland, David R. 2004 Technical Report
Guidebook on Pedestrian and Bicycle Volume Data Collection Ryus, Paul; Ferguson, Erin; Laustsen, Kelly M.; Schneider, Robert J.; Proulx, Frank R.; Hull, Tony; Miranda-Moreno, Luis 2014 Technical Report
Driver Behavior at Rail Crossings: Cost-Effective Improvements to Increase Driver Safety at Public At-Grade Rail-Highway Crossings in California Cooper, Douglas L.; Ragland, David R. 2007 Technical Report
False Alarms and Human-Machine Warning Systems Zabyshny, Aleksandr; Ragland, David R. 2003 Technical Report
The Association between Booster Seat Use and Risk of Death Among Motor Vehicle Occupants aged 4–8: A Matched Cohort Study Rice, Thomas M.; Anderson, Craig L.; Lee, A. S. 2009 Technical Report
Teens and Driving in California: Summary of Research and Best Practices Bui, Huong; Arnold, Lindsay S.; Cooper, Jill F.; Ragland, David R. 2006 Technical Report
California Traffic Safety Survey 2025 Ewald, Katrin; Wasserman, Lisa 2025 Technical Report
Develop Methods to Reduce or Prevent Backing Crashes Cooper, Douglas L.; Duffy, Sarah; Orrick, Phyllis; Ragland, David R. 2009 Technical Report
Low Income Childhood Pedestrian Injury: Understanding the Disparate Risk Johnson, Emily S.; Geyer, Judy A.; Rai, Nirmeet; Ragland, David R. 2004 Technical Report
Safe Routes to School Local School Project: A health evaluation at 10 low-income schools Cooper, Jill F.; McMillan, Tracy 2010 Technical Report
Pre-Intervention Assessment: UC Davis Medical Center and California Health Care Safety Net Institute Child Passenger Safety Initiative Cooper, Jill F.; Ragland, David R.; MacLeod, Kara E.; Jameson, Wendy 2002 Technical Report
Introducing an Intelligent Intersection Grembek, Offer; Kurzhanskiy, Alex A.; Medury, Aditya; Varaiya, Pravin; Yu, Mengqiao 2018 Technical Report
Applying Safety Treatments To Rail-Highway At-Grade Crossings Cooper, Douglas L.; Ragland, David R. 2012 Technical Report
Error Consideration for Geocoding Police Reported Collision Data in California Bigham, John M.; Oum, Sang Hyouk 2014 Technical Report
California Intersection Decision Support: A Systems Approach to Achieve Nationally Interoperable Solutions Chan, Ching-Yao; Cody, Delphine; Cohn, Theodore; Dickey, Susan; Greenhouse, Dan; Mak, Tony; Marco, David; Nguyen, Khoi; Misener, James A.; Nowakowski, Christopher; Ossenbrugen, Paul ; Ragland, David R.; Shladover, Steven E.; Tan, Swe-kuang; Vanderwerf, Joel; Wang, Xiqin; Zabyshny, Aleksandr; Zennaro, Marco 2005 Technical Report
Seamless Travel: Measuring Bicycle and Pedestrian Activity in San Diego County and its Relationship to Land Use, Transportation, Safety, and Facility Type Jones, Michael G.; Ryan, Sherry; Donlon, Jennifer; Ledbetter, Lauren; Ragland, David R.; Arnold, Lindsay S. 2010 Technical Report
The Association Between Health Problems and Driver Status Among Older Adults MacLeod, Kara E.; Geyer, Judy A.; Satariano, William A.; Ragland, David R. 2004 Technical Report
Community Pedestrian and Bicycle Safety Training Program Evaluation Report Doggett, Sarah; Beck, Kate M.; Ana Lopez; Cooper, Jill F. 2019 Technical Report
Airports and Bicycles: what are the obstacles and incentives for operators to improve bicycle access? Orrick, Phyllis; Frick, Karen Trapenberg 2013 Technical Report
The Continuous Risk Profile Approach for the Identification of High Collision Concentration Locations on Congested Highways Chung, Koohong; Ragland, David R.; Madanat, Samer; Oh, Soon Mi 2009 Technical Report
Cost-Effectiveness of Traffic Safety Interventions in the United States Vahidnia, Farnaz; Walsh, Julia 2002 Technical Report
We All Want the Same Thing Results from a Roadway Design Survey of Pedestrians, Drivers, Bicyclists, and Transit Users in the Bay Area Sanders, Rebecca L.; Cooper, Jill F. 2012 Technical Report
Methods for Identifying High Collision Concentration Locations for Potential Safety Improvements Geyer, Judy; Lankina, Elena; Chan, Ching-Yao; Ragland, David R.; Pham, Trinh; Sharafsaleh, Mohammad A. 2008 Technical Report
Evaluation of Traffic and Environment Effects on Skid Resistance and Safety Performance of Rubberized Open-grade Asphalt Concrete Oh, Soon Mi; Ragland, David R.; Chan, Ching-Yao 2010 Technical Report
Bicycle Helmet Use: Workbook and Guide for Evaluating Community-Based Programs Geyer, Judy; Cooper, Jill F.; Ragland, David R. 2003 Technical Report
Oakland Chinatown Pedestrian Scramble: An Evaluation Bechtel, Allyson K.; MacLeod, Kara E.; Ragland, David R. 2003 Technical Report
Building a Highway Linear Referencing System from Preexisting Reference Marker Measurements for Transportation Data Management Bigham, John M.; Kang, Sanghyeok 2013 Technical Report
Estimating Pedestrian Accident Exposure: Protocol Report Greene-Roesel, Ryan; Diogenes, Mara Chagas; Ragland, David R. 2007 Technical Report
Strategies for Reducing Pedestrian and Bicyclist Injury at the Corridor Level Grembek, Offer; Zhang, Yuanyuan; Yavari, Afsaneh; Yang, Zhao; Ragland, David R. 2013 Technical Report
Experimental Evaluation of the Continuous Risk Profile (CRP) Approach to the Current Caltrans Methodology for High Collision Concentration Location Identification Grembek, Offer; Kim, Kwangho; Kwon, Oh Hoon; Lee, Jinwoo; Liu, Haotian; Park, Min Ju; Washington, Simon; Ragland, David R.; Madanat, Samer M. 2012 Technical Report
Safety Evaluation of High-Occupancy Vehicle (HOV) Facilities in California Ragland, David R.; Oh, Soonmi; Chan, Ching-Yao 2008 Technical Report
Pedestrian and Bicycle Safety Evaluation for the City of Emeryville at Four Intersections Johnson, Emily S.; Ragland, David R.; Cooper, Jill F.; O'Connor, Terri 2005 Technical Report
A Review of ITS-Based Pedestrian Injury Countermeasures Bechtel, Allyson K.; Geyer, Judy A.; Ragland, David R. 2003 Technical Report
California Traffic Safety Survey 2021 Ewald, Katrin; Wasserman, Lisa 2021 Technical Report
HOV Lane Configurations and Safety Performance of California Freeways – An Investigation of Differential Distributions and Statistical Analysis Jang, Kitae; Chan, Ching-Yao 2009 Conference Paper
Changes in Driver Behavior Resulting from Pedestrian Countdown Signals Huey, S. Brian; Ragland, David R. 2007 Conference Paper
Addressing Inappropriate Driver Behavior at Rail-Highway Crossings Cooper, Douglas L.; Ragland, David R. 2008 Conference Paper
Gap acceptance for vehicles turning left across on-coming traffic: Implications for Intersection Decision Support design Ragland, David R.; Arroyo, Sofia; Shladover, Steven E.; Misener, James A.; Chan, Ching-Yao 2005 Conference Paper
Property Damage Crash Equivalency Factors for Solving the Crash Frequency-Severity Dilemma: Case Study on South Korean Rural Roads Oh, Jutaek; Washington, Simon; Lee, Dongmin 2010 Conference Paper
Safety Performance of High-Occupancy Vehicle (HOV) Facilities: Evaluation of HOV Lane Configurations in California Jang, Kitae; Chung, Koohong; Ragland, David R.; Chan, Ching-Yao 2009 Conference Paper
What They Don’t Know Can Kill Them Mitman, Meghan F.; Ragland, David R. 2007 Conference Paper
Effectiveness of a Commercially Available Automated Pedestrian Counting Device in Urban Environments: Comparison with Manual Counts Greene-Roesel, Ryan; Diogenes, Mara Chagas; Ragland, David R.; Lindau, Luis Antonio 2008 Conference Paper
Providing Intersection Decision Support under Challenging Conditions Shladover, Steven E.; VanderWerf, Joel; Ragland, David R. 2005 Conference Paper
Using Variable Speed Limits To Reduce Rear-End Collision Risks Near Recurrent Bottlenecks Li, Zhibin; Liu, Pan; Bigham, John M.; Ragland, David R. 2013 Conference Paper
Driver and Pedestrian Behavior at Uncontrolled Crosswalks in the Tahoe Basin Recreation Area Mitman, Meghan F.; Cooper, Douglas L.; DuBose, Brooke 2010 Conference Paper
Analysis of Wet Weather Related Collision Concentration Locations: Empirical Assessment of Continuous Risk Profile Oh, Soonmi; Chung, Koohong; Ragland, David R.; Chan, Ching-Yao 2009 Conference Paper
San Pablo Avenue Pedestrian Signal Timing Optimization Nguyen, Ahn; Ragland, David R. 2007 Conference Paper
Safety Assessment of Uncontrolled Intersections Using Both Conflict Probability and Severity Ma, Yingying; Qin, Xiaoran; Grembek, Offer; Chen, Zhiwei 2016 Conference Paper
Dynamic Programming-based Pedestrian Hotspot Identification Approach Medury, Aditya; Grembek, Offer 2014 Conference Paper
Pedestrian and Bicyclist Safety Effects of the California Safe Routes to School Program Gutierrez, Nicolas; Orenstein, Marla; Cooper, Jill F.; Rice, Thomas M.; Ragland, David R. 2008 Conference Paper