This map shows the geographic impact of D L Harkey'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 D L Harkey with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites D L Harkey more than expected).
This network shows the impact of papers produced by D L Harkey. 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 D L Harkey. The network helps show where D L Harkey may publish in the future.
Co-authorship network of co-authors of D L Harkey
This figure shows the co-authorship network connecting the top 25 collaborators of D L Harkey.
A scholar is included among the top collaborators of D L Harkey 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 D L Harkey. D L Harkey 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.
Harkey, D L. (2013). Effect of Intersection Angle on the Safety of Intersections.. NCSU Libraries Repository (North Carolina State University Libraries).2 indexed citations
2.
Harkey, D L, et al.. (2008). Development of a Web-Based Expert System for Setting Speed Limits in Speed Zones. Transportation Research Board 87th Annual MeetingTransportation Research Board.5 indexed citations
3.
Harkey, D L, Daniel L. Carter, Janet M. Barlow, & Billie Louise Bentzen. (2007). Accessible Pedestrian Signals: A Guide to Best Practices.13 indexed citations
4.
Harkey, D L, et al.. (2007). Guidelines for Accessible Pedestrian Signals.1 indexed citations
5.
Harkey, D L, et al.. (2007). Model Minimum Inventory of Roadway Elements--MMIRE.3 indexed citations
6.
Harkey, D L, et al.. (2006). Pedestrian and Bicycle Crash Analysis Tool (PBCAT): Version 2.0 Application Manual. Rosa P: A digital library for transportation research (United States Department of Transportation).8 indexed citations
Staplin, Loren, et al.. (2001). Guidelines and Recommendations to Accommodate Older Drivers and Pedestrians [2001-05].40 indexed citations
11.
Hunter, W W, et al.. (2000). EVALUATION OF THE BLUE BIKE LANE TREATMENT USED IN BICYCLE-MOTOR VEHICLE CONFLICTS AREAS IN PORTLAND, OREGON.2 indexed citations
12.
Harkey, D L. (1999). DEVELOPMENT OF A GIS-BASED CRASH REFERENCING AND ANALYSIS SYSTEM.1 indexed citations
13.
Harkey, D L, et al.. (1998). THE BICYCLE COMPATIBILITY INDEX: A LEVEL OF SERVICE CONCEPT, IMPLEMENTATION MANUAL. Rosa P: A digital library for transportation research (United States Department of Transportation).30 indexed citations
Hughes, R G & D L Harkey. (1996). Lane conditions, traffic speed, and volume: effects on cyclists' perception of risk in a virtual environment.1 indexed citations
16.
Harkey, D L. (1995). INTERSECTION GEOMETRIC DESIGN ISSUES FOR OLDER DRIVERS AND PEDESTRIANS.2 indexed citations
17.
Harkey, D L, et al.. (1993). EFFECT OF NONPERMANENT PAVEMENT MARKINGS ON DRIVER PERFORMANCE. Transportation Research Record Journal of the Transportation Research Board.5 indexed citations
18.
Harkey, D L, Charles V. Zegeer, Jill R. Stewart, & D W Reinfurt. (1992). OPERATIONAL IMPACTS OF WIDER TRUCKS ON NARROW ROADWAYS. Transportation Research Record Journal of the Transportation Research Board.
19.
Harkey, D L, et al.. (1990). ASSESSMENT OF CURRENT SPEED ZONING CRITERIA. Transportation Research Record Journal of the Transportation Research Board.30 indexed citations
20.
Harkey, D L, et al.. (1989). HISAM: AN ACCIDENT DATA BASE MANAGER. Transportation Research Record Journal of the Transportation Research Board.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.