Citations per year, relative to G L Ullman G L Ullman (= 1×)
peers
Kenneth R. Agent
Countries citing papers authored by G L Ullman
Since
Specialization
Citations
This map shows the geographic impact of G L Ullman'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 G L Ullman with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites G L Ullman more than expected).
This network shows the impact of papers produced by G L Ullman. 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 G L Ullman. The network helps show where G L Ullman may publish in the future.
Co-authorship network of co-authors of G L Ullman
This figure shows the co-authorship network connecting the top 25 collaborators of G L Ullman.
A scholar is included among the top collaborators of G L Ullman 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 G L Ullman. G L Ullman is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Ullman, G L, et al.. (2016). Crash Cost Reduction Benefits of Portable Concrete Barrier Use in Work Zones. Transportation Research Board 95th Annual MeetingTransportation Research Board.2 indexed citations
3.
Pesti, Géza, et al.. (2013). Simulation Based Evaluation of Dynamic Queue Warning System Performance. Transportation Research Board 92nd Annual MeetingTransportation Research Board.3 indexed citations
4.
Ullman, G L, et al.. (2013). Construction Traveler Information Systems for I-35 Widening in Central Texas. Transportation Research Board 92nd Annual MeetingTransportation Research Board.1 indexed citations
5.
Ullman, G L, et al.. (2007). FUNCTIONAL REQUIREMENTS FOR HIGHLY-PORTABLE POSITIVE PROTECTION TECHNOLOGIES IN WORK ZONES. Transportation Research Board 86th Annual MeetingTransportation Research Board.4 indexed citations
6.
Ullman, G L, et al.. (2006). Analysis of Crashes at Active Night Work Zones in Texas. Transportation Research Board 85th Annual MeetingTransportation Research Board.11 indexed citations
7.
Anderson, Stuart D., et al.. (2002). A PROCESS FOR SELECTING STRATEGIES FOR REHABILITATION OF RIGID PAVEMENTS.3 indexed citations
8.
Anderson, Stuart D. & G L Ullman. (2000). Reducing and Mitigating Impacts of Lane Occupancy During Construction and Maintenance.8 indexed citations
9.
Ullman, G L, et al.. (2000). TEXAS DOT VEHICLE FLEET WARNING LIGHT POLICY RESEARCH. Transportation research circular.5 indexed citations
10.
Ullman, G L, et al.. (1999). THE NATIONAL WORK-ZONE SAFETY INFORMATION CLEARINGHOUSE. Public roads. 62(6). 30–31.17 indexed citations
11.
Ullman, G L, et al.. (1997). A SPECIAL EVENT PARK-AND-RIDE SHUTTLE BUS SUCCESS STORY. ITE journal. 67(12).4 indexed citations
12.
Ullman, G L, et al.. (1995). MOTORIST INTERPRETATION OF YELLOW X AND YELLOW DIAGONAL ARROW IN FREEWAY LANE CONTROL SIGNAL ARRAY. Transportation Research Record Journal of the Transportation Research Board. 9–16.2 indexed citations
13.
Ullman, G L, C L Dudek, & Kevin Balke. (1994). EFFECT OF FREEWAY CORRIDOR ATTRIBUTES ON MOTORIST DIVERSION RESPONSES TO TRAVEL TIME INFORMATION. Transportation Research Record Journal of the Transportation Research Board.11 indexed citations
14.
Ullman, G L. (1993). Motorist interpretation of MUTCD freeway lane control signals. Transportation Research Record Journal of the Transportation Research Board. 49–56.2 indexed citations
15.
Dudek, C L & G L Ullman. (1992). FREEWAY CORRIDOR MANAGEMENT.4 indexed citations
16.
Ullman, G L. (1991). EFFECT OF RADAR TRANSMISSIONS ON TRAFFIC OPERATIONS AT HIGHWAY WORK ZONES. Transportation Research Record Journal of the Transportation Research Board.19 indexed citations
17.
Ullman, G L, et al.. (1989). DELINEATION OF URBAN FREEWAY GORE AREA CRASH CUSHIONS IN TEXAS. Transportation Research Record Journal of the Transportation Research Board.2 indexed citations
18.
Dudek, C L & G L Ullman. (1989). TRAFFIC CONTROL FOR SHORT-DURATION MAINTENANCE OPERATIONS ON FOUR-LANE DIVIDED HIGHWAYS. Transportation Research Record Journal of the Transportation Research Board.4 indexed citations
19.
Ullman, G L, et al.. (1987). SUPPLEMENTAL DEVICES TO ENHANCE FLAGGER SAFETY. Transportation Research Record Journal of the Transportation Research Board.2 indexed citations
20.
Ullman, G L, et al.. (1987). AN EVALUATION OF PORTABLE TRAFFIC SIGNALS AT WORK ZONES. Transportation Research Record Journal of the Transportation Research Board.4 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.