March 14, 2019, 12:00PM (ET)

Development of Statewide Guidelines for Implementing Leading Pedestrian Intervals in Florida

Pedestrian safety is an ongoing major concern throughout the United States and is one of the highest priorities for the Florida Department of Transportation (FDOT). Vehicles often fail to yield to pedestrians at intersections, especially when pedestrians enter an intersection with a corresponding green signal in the same direction of vehicle travel. Leading Pedestrian Interval (LPI) has been implemented as a low-cost countermeasure to provide pedestrians an advance start before the concurrent green traffic signal to increase pedestrian visibility and safety in crosswalk. However, the LPI is not universally applied at all intersections since it is dependent on the characteristics of intersection geometry, vehicle and pedestrian traffic conditions, traffic signal timing, etc.

A comprehensive and integrated study sponsored by FDOT was conducted to determine the suitability and effectiveness of LPI implementation at signalized intersections to improve pedestrian safety and to develop robust guidelines for LPI implementation. This webcast will focus on the presentation of major project tasks and findings, LPI effectiveness, LPI warrants, illustrated examples, LPI implementation guidelines and recommendations. The research results and findings from this FDOT-sponsored project provide clear insights into the suitability of LPI implementation and its effectiveness in increasing pedestrian safety at signalized intersections, and also offer traffic engineers and managers a simple and robust tool for appropriate and effective LPI implementation. Download Handout

Presenter: Pei-Sung Lin, Ph.D., P.E., PTOE, FITE, Program Director,  ITS, Traffic Operations and Safety, Center for Urban Transportation Research

Dr. Pei-Sung Li headshotDr. Pei-Sung Lin is Director of the ITS, Traffic Operations and Safety Program at the Center for Urban Transportation Research (CUTR) at the University of South Florida. Dr. Lin in also the Director of Florida Local Technical Assistance Program (LTAP) Center. He earned his master’s degree from the University of Texas at Austin in 1991 and doctoral degree from the University of Florida in 1995. He is a registered Professional Engineer (P.E.) in Florida and a certified Professional Traffic Operations Engineer (PTOE) by the Institute of Transportation Engineers (ITE). Dr. Lin is also an ITE fellow. He has 26 years of work and research experience in transportation, specializing in traffic signal systems, traffic engineering and operations, pedestrian and bicycle safety, wrong-way driving prevention, crash analysis, intelligent transportation systems, and automated vehicles. Dr. Lin has conducted more 120 research projects and grants, published and presented numerous technical papers at national and international conferences and meetings. Dr. Lin served as chair of the ITE Intelligent Traffic Signal Operations Committee from 2005 to 2015. He also served as President of the International Chinese Transportation Professionals Association from 2013 to 2015. Dr. Lin was the recipient of prestigious ITE Edward A. Mueller – District 10 Transportation Engineer of the Year Engineer of the Year in 2017.


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