Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Physical Activity and Reduced Occurrence of Non-Insulin-Dependent Diabetes Mellitus
19911.2k citationsDavid R. Ragland et al.profile →
Citations per year, relative to David R. Ragland David R. Ragland (= 1×)
peers
Robyn Norton
Countries citing papers authored by David R. Ragland
Since
Specialization
Citations
This map shows the geographic impact of David R. Ragland's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by David R. Ragland with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites David R. Ragland more than expected).
Fields of papers citing papers by David R. Ragland
This network shows the impact of papers produced by David R. Ragland. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by David R. Ragland. The network helps show where David R. Ragland may publish in the future.
Co-authorship network of co-authors of David R. Ragland
This figure shows the co-authorship network connecting the top 25 collaborators of David R. Ragland.
A scholar is included among the top collaborators of David R. Ragland based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with David R. Ragland. David R. Ragland is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
All Works
20 of 20 papers shown
1.
Amiri, Amir Mohammadian, Navid Nadimi, David R. Ragland, & Reza Imaninasab. (2018). Predicting Crash Severity Based on Its Related Collision Type Using Five Data Mining Techniques. Transportation Research Board 97th Annual MeetingTransportation Research Board.5 indexed citations
2.
Ragland, David R., et al.. (2015). Traffic Safety Among Latino Populations in California: Current Status and Policy Recommendations. eScholarship (California Digital Library).2 indexed citations
3.
Guler, S. Ilgin, Offer Grembek, & David R. Ragland. (2013). Using Time-Based Metrics to Compare Crash Risk Across Modes and Locations. Transportation Research Board 92nd Annual MeetingTransportation Research Board.1 indexed citations
4.
Zhang, Yuanyuan, John Bigham, Zhibin Li, David R. Ragland, & Xiaohong Chen. (2012). Associations between Road Network Connectivity and Pedestrian-Bicyclist Accidents. Transportation Research Board 91st Annual MeetingTransportation Research Board.17 indexed citations
5.
Frick, Karen Trapenberg, et al.. (2011). Bicycle Infrastructure that Extends beyond the Door: examining investments in bicycle-oriented design through a qualitative survey of commercial building owners and tenants. eScholarship (California Digital Library).2 indexed citations
6.
Chung, Koohong, et al.. (2009). Analysis of Wet Weather Related Collision Concentration Locations: Empirical Assessment of Continuous Risk Profile. eScholarship (California Digital Library).2 indexed citations
Banerjee, Ipsita, et al.. (2009). San Francisco PedSafe II Project Outcomes and Lessons Learned. eScholarship (California Digital Library).2 indexed citations
9.
Ragland, David R., et al.. (2008). Addressing Inappropriate Driver Behavior at Rail-Highway Crossings. eScholarship (California Digital Library).2 indexed citations
10.
Gutiérrez, Nicolás L., et al.. (2008). PEDESTRIAN AND BICYCLIST SAFETY EFFECTS OF THE CALIFORNIA SAFE ROUTES TO SCHOOL PROGRAM. eScholarship (California Digital Library).6 indexed citations
11.
Ragland, David R., et al.. (2008). The Marked Crosswalk Dilemma: Uncovering Some Missing Links in a 35-Year Debate. RePEc: Research Papers in Economics.7 indexed citations
12.
Jang, Kitae, Koohong Chung, David R. Ragland, & Ching‐Yao Chan. (2008). Comparison of collisions on HOV facilities with limited and continuous access during peak hours. Transportation Research Board 87th Annual MeetingTransportation Research Board.2 indexed citations
13.
Ragland, David R., et al.. (2008). Removing Barriers for Seniors at Transit Stops and Stations and the Potential for Transit Ridership Growth. eScholarship (California Digital Library).2 indexed citations
14.
Ragland, David R., et al.. (2007). Estimating Pedestrian Accident Exposure: Approaches to a Statewide Pedestrian Exposure Database. eScholarship (California Digital Library).1 indexed citations
15.
Chung, Koohong & David R. Ragland. (2007). Method for Generating Continuous Risk Profile for Highway Collisions. Transportation Research Board 86th Annual MeetingTransportation Research Board.5 indexed citations
16.
Orenstein, Marla, et al.. (2007). Safe Routes to School Safety and Mobility Analysis. eScholarship (California Digital Library).17 indexed citations
17.
Ragland, David R., et al.. (2007). Driver Behavior at Rail Crossings: Cost-Effective Improvements to Increase Driver Safety at Public At-Grade Rail-Highway Crossings in California. eScholarship (California Digital Library).4 indexed citations
18.
Chung, Koohong, Ching‐Yao Chan, Kitae Jang, David R. Ragland, & Yonghee Kim. (2007). HOV Lane Configurationsand Collision Distribution on Freeway Lanes – An Investigation of Historical Collision Data in California. eScholarship (California Digital Library).3 indexed citations
19.
Ragland, David R., et al.. (2003). A Review of ITS-Based Pedestrian Injury Countermeasures. eScholarship (California Digital Library).5 indexed citations
20.
Ragland, David R., et al.. (1980). Behavioral approaches to the treatment of hypertension : a bibliography.1 indexed citations
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.