graphical image of female's profile with traffic symbols surrounding her head

Session No. 1A

Session Title:  Prioritizing transit movement in mixed traffic environments

Session Description: The provision of high-quality public transportation service can offer many benefits to society. Because transit vehicles can serve more people than private automobiles while using less roadway space, high transit usage can help mitigate congestion by both using available space more efficiently and removing cars from our roadways. High transit usage can also reduce total vehicle miles traveled and other negative externalities, such as fuel consumption and harmful vehicle emissions. However, transit vehicles operating in mixed environments are often negatively impacted by congestion due to private automobiles. This congestion can degrade overall performance of public transportation systems, which keeps people from using public transit service. This session focuses on innovative research and successful implementation of strategies designed to prioritize transit vehicle movements in mixed environments. As will be shown, a variety of strategies exist that can help provide more reliable transit service while minimizing negative impacts to other vehicles.

Moderator Name: Hugh A. Mose, PE – Transportation Consultant

Novel Transit Priority Treatments for Improved Person Mobility, S. Ilgin Guler, Assistant Professor, Penn State

Traffic Engineering for Optimal TSP Success, Mark Yedlin, Director of Simulation Modeling Services, Greenman-Pedersen, Inc. (GPI)

TSP at isolated intersections: Some advances under simulation environment, Zhengyao Yu, Ph.D. Candidate, Penn State

Speaker Bios

S. Ilgin Guler received dual B.S. degrees from Bogazici University, Istanbul, Turkey in civil engineering and industrial engineering and operations research. She received her M.S. and Ph.D. degrees from the University of California, Berkeley in civil and environmental engineering.  After completing her Ph.D., she served as a post-doctoral scholar in the Institute of Transport Systems and Planning at ETH Zurich, Switzerland. She is an assistant professor in the Department of Civil andEnvironmental Engineering at The Pennsylvania State University. Her research interests include multi-modal urban traffic operations and control, intelligent transportation systems, connected and autonomous vehicles and infrastructure management. Her research has resulted in 20 peer-refereed journal articles and 28 refereed conference proceedings on topics that include multi-modal traffic safety, multi-modal traffic operations and multi-modal traffic control. She serves as the major research advisor for Ph.D., Master’s and undergraduate students. 

Dr. Guler has been the primary author to multiple research proposals funded by institutions such as the Pennsylvania DOT, South Dakota DOT, Swiss National Science Foundation and Swiss Association of Road Transportation Experts. She is currently serving as the Penn State PI on NCHRP 17-84: Pedestrian and Bicycle safety performance functions for the Highway Safety Manual. Dr. Guler is the winner of the 2018 Fred Burggraf Award for the Best Paper in Transportation Research Record, the Journal of the Transportation Research Board of the National Academies. Dr. Guler serves as an active member of the Transportation Research Board’s Traffic Flow Theory and Characteristics committee (AHB 45) and serves on the Editorial Board of Transportation Research Part C. 

Mark Yedlin is the Director of Simulation Modeling Services for Greenman-Pedersen, Inc., (GPI). He has over 40 years of experience as a transportation professional specializing in the development and application of traffic simulation models to evaluate proposed improvements to traffic operations. He’s held corporate executive and project management positions overseeing numerous transportation studies and was one of the original developers of FHWA’s CORSIM simulation model. 

Mark became involved in Transit Signal Priority (TSP) for FHWA in 1981 and helped SEPTA initiate TSP in the late 1990s.  Since 2011 he has been leading GPI’s efforts to help the New York City Department of Transportation implement TSP city-wide. This work was featured in the Winter 2018 edition of Traffic & Transit Magazine; merited a Diamond Award from the New York Chapter of the American Council of Engineering Companies (ACEC); and received national recognition from ACEC. It also led to GPI becoming a finalist for ITS America’s Best of ITS Award in 2018. 

He holds a B.S. Degree in Physics from Fordham University, a B.S. Degree in Civil Engineering from Columbia University and an M.S. in Transportation Engineering from Polytechnic Institute of NY now the NYU School of Engineering.

Zhengyao Yu is a Ph.D. student in Civil Engineering at Penn State. His research interests include traffic flow theory, urban network operation, and public transportation. He is the author of two journal papers and three conference papers on bus travel time and occupancy prediction, intersection signal timing optimization, and urban network configuration comparison.

He received his B.S. degree in Civil Engineering from Tongji University in 2014 and his M.S. degree in Civil Engineering from Penn State in 2015. He is the winner of best student presentation award at Transportation Engineering and Safety Conference (2017) and American Public Transportation Association Fellowship (2015).

< Back to full agenda

Wednesday, December 5, 2018

1:30 to 3:00 p.m.

Room 106

  • Full Presentation Slides (PDF)

Traffic Engineering for Optimal TSP Success

TSP at isolated intersections: Some advances under simulation environment





The Transportation Engineering and Safety Conference (TESC) attracts professionals from throughout Pennsylvania, the mid-Atlantic region, and the country. It is an authoritative source of information on pressing issues from some of the foremost experts in transportation today.

Thomas D. Larson Pennsylvania Transportation Institute

201 Transportation Research Building

The Pennsylvania State University

University Park, PA 16802-4710

Phone: 814-865-1891