Signs and Signals
Need more information?
The Minnesota LTAP Librarian can help you find and obtain LTAP and CTS publications and research, as well as transportation-related materials from other libraries and databases. Please call 612-624-3646 or e-mail mathi032@umn.edu.
Publications and Web sites
Signal Timing Manual
FHWA Office of Operations, 2008
The first comprehensive guide to current practices related to traffic signal timing. Property timed signals save gas by keeping traffic moving smoothly. All the elements of signal timing, from policy and funding considerations to timing plan development, assessment, and maintenance are covered. The manual is the culmination of research into practices across North America and serves as a reference for a range of practitioners, including traffic engineers, signal technicians, design engineers, teachers, and university students.
Maintaining Traffic Sign Retroreflectivity
2008 Rule Revision
The FHWA Office of Safety advised all LTAP Centers that the Final Rule for maintained sign retroreflectivity went into effect on January 22, 2008.
The FHWA Visibility Web site includes the text of the rule, the changes to the MUTCD text, a brochure that explains the changes, and other related items.
Ken Schroepfer and Kathy Schaefer of Mn/DOT created this presentation on Minimum Retroreflectivity Levels for Traffic Signs (1.58 MB PDF) in March 2008.
Minnesota Manual on Uniform Traffic Control Devices (MN MUTCD)
2005, revised in 2007
The 2005 “Minnesota Manual on Uniform Traffic Control Devices for Streets and Highways” (2005 MN MUTCD) has been established to provide a uniform policy for all traffic control devices on all public streets, roads and highways within the State of Minnesota. It is based on the Federal MUTCD, and published by the Mn/DOT Office of Traffic, Security and Operations- Publications, which also publishes the Minnesota Flagging Manual, Temporary Traffic Control Zone Layouts Field Guide, and more.
Traffic Signal Management Resources
Federal Highway Adminstration, (FHWA)
The FHWA is committed to providing the tools necessary to assist agencies in developing and sustaining effective traffic signal management, operations, maintenance and signal timing practices. To improve traffic signal operations, the Arterial Management Program has strategically developed a toolbox with a blend of Outreach, Guidance, Training and Research to advance each of the focus areas.
Effectiveness of "Children at Play" Warning Signs (PDF)
Transportation Synthesis Report
Wisconsin Department of Transportation, 2007
A summary of research on the effectiveness of warning signs related to children.
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