PSU Transportation Seminar: Active Transportation Counts From Existing On-Street Signal And Detection Infrastructure

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Friday, November 3, 2023, 11:30am to 12:30pm PDT
Sirisha Kothuri, Portland State University
Free and open to the public
ONLINE and IN-PERSON: PSU's Vanport Building (Room 269) 1810 SW 5th Ave Portland, OR 97201
PDH: 1 | AICP: 1

Transportation Seminars at Portland State University have been a tradition since 2000. Formerly known as the Friday Transportation Seminar series, we've opened up PSU Transportation Seminars to other days of the week to better accommodate attendance. You can always watch online via Zoom.



The goal of agencies is to provide a safe and reliable multimodal transportation system that connects people and helps communities and economy thrive. In order to fulfill this mission, it is important to have a robust understanding of the usage of each mode within the system as well as the linkages between modes. Currently there is no systemic accounting of pedestrian traffic across the transportation network, making it difficult to understand systemic crash safety and prioritize projects. Analysts must rely on imperfect proxies such as land use density, race, income, and transit usage in the absence of measured pedestrian traffic data.

A noteworthy possibility is to utilize existing traffic signal infrastructure to count pedestrians by using push-button actuation systems as permanent traffic counters. This presentation reports on the findings of a research study that sought to examine the feasibility of estimating pedestrian volumes from existing on-street infrastructure, such as pedestrian push-buttons, at a large scale.


  • Explore the feasibility of collecting pedestrian data from existing on-street infrastructure.
  • Develop adjustment factors to convert pedestrian data to actual pedestrian counts.
  • Determine the transferability of the methods developed and the efforts needed to apply these methods statewide.


Sirisha Kothuri, Senior Research Associate, Civil and Environmental Engineering, Portland State University

Sirisha Kothuri, Ph.D. is a senior research associate in the Department of Civil and Environmental Engineering at Portland State University. Dr. Kothuri’s primary research interests are in the areas of multimodal traffic operations, bicycle and pedestrian counting, and safety.


This 60-minute seminar is eligible for 1 hour of professional development credit for AICP (see our provider summary). We can provide an electronic attendance certificate for other types of certification maintenance.

Photo courtesy of Portland Bureau of Transportation

Portland State University's Transportation Research and Education Center (TREC) is home to the U.S. DOT funded National Institute for Transportation and Communities (NITC), the Initiative for Bicycle and Pedestrian Innovation (IBPI), PORTAL, BikePed Portal and other transportation grants and programs. We produce impactful research and tools for transportation decision makers, expand the diversity and capacity of the workforce, and engage students and professionals through education and participation in research.