| The Use of Wider
Longitudinal Pavement Markings, Presenter, Tim Gates. This
presentation summarizes the findings from a 2001 agency survey and literature
search investigating the use of long-line pavement markings in the U.S. and
Canada that are wider than 4 inches. Presented are: agencies using wider lines,
line types that are wider, roadways where they are used, reasons for using,
basis for implementation, and benefits associated with their use as reported by
agencies and literature. (Packaged Powerpoint file
2.7MB)
Yellow Transition Lane
Control Signal Symbols for Freeway Traffic Management,
Presenter, Melisa Finley. This presentation summarizes the research
performed to assess the effectiveness and applicability of diagonal and
downward yellow arrows (non-standard lane control signal symbols) for freeway
traffic management purposes. Included are the findings from investigations of
motorist understanding and perceived usefulness of the arrows, and findings
from a series of field studies.(Packaged Powerpoint file 1.7
MB)
Sequential Warning Light
System for Work Zone Lane Closures, Presenter, Melisa
Finley. This presentation summarizes the research performed to assess the
effectiveness of a flashing warning light system for use at work zone lane
closures. Included are the findings from investigations of motorist
understanding and perceived usefulness of various designs of the system, and
the findings from field studies in actual work zone applications.(Packaged Powerpoint file 1.0 MB)
Real-Time Offset
Tuning: Motivation, Findings, and Lessons Learned, Presenter,
Montasir M. Abbas. This presentation highlights the advantages of real-time
offset tuning that bridges the gap between widely installed closed-loop systems
and fully adaptive control systems. The presentation shows the results of
applying Purdue Real-time Offset Transitioning Algorithm (PRO-TRACTS) to two
different case study networks. The presentation shows some of the cycle
transitioning issues and the pros and cons of using hardware-in-the-loop versus
CORSIM’s internal control algorithm. Dr. Abbas developed PRO-TRACTS while
pursuing his Ph.D. at Purdue University under the supervision of Professor
Darcy Bullock. (Packaged Powerpoint file 3.0 MB)
Interpretations Of
Time-related Dynamic Message Sign Messages By Texas Drivers
Presenter, Conrad Dudek This presentation summarizes the research
results of four studies related to time-related dynamic message sign (DMS)
messages. Included are the findings from human factors laboratory studies
conducted in Texas to determine those messages that best convey time-related
information required and desired by motorists in Texas. Also included are
recommendations based on the results of the study. (Packaged
Powerpoint file 1.4 MB)
Minimum Retroreflectivity for
Overhead and Street Name Signs Presenter, Paul Carlson This
presentation summarizes the research performed in order to establish a set of
recommended minimum retroreflectivity values for overhead guide signs and
street name signs. (Packaged Powerpoint file 6.0 MB)
Evaluation of Clearview Alphabet
on Guide Signs with Prismatic Sheeting Presenter, Paul
Carlson This presentation provides an overview of a TxDOT-sponsored
project. The main objective of the project was to evaluate the legibility
performance of the ClearviewOne alphabet on shoulder-mounted and overhead guide
signs fabricated with microprismatic retroreflective sheeting. The baseline for
comparison was the Series E(Modified) alphabet. (Packaged
Powerpoint file 8.2 MB)
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