Portland State University

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Summary: Transit serves as backbone infrastructure for many regional and local visions for sustainable urban development. Also, many modern policies predicate transit funding on the potential for transit-oriented development (TOD) near proposed infrastructure investments. However, little research has examined how TOD considerations have informed transit planning. This presentation discusses the results of recent dissertation research that fills this gap. Through multiple transit project case studies and interviews with nearly 100 transit planning professionals, this research categorized how transit projects across 19 U.S. regions were designed to foster TOD and how transit planning professionals identified TOD opportunities as projects were planned. During interviews, many professionals lamented the amount of real estate development that had occurred around the transit projects they helped plan. Analysis revealed that the ways in which professionals identified TOD opportunities helped to explain disconnects between their expectations and actual outcomes. The findings raise concerns about the effectiveness and efficiency of transit planning practice in the age of transit-oriented development and point to potential policy and practice changes that could address the issues.

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Transit signal priority (TSP) is designed to reduce delay for transit vehicles through signalized intersections. For an existing TSP system, it is important to assess how timely and effective TSP phases are granted to buses that request priority. It is also necessary to evaluate the time savings and delays for buses and other vehicles as a result of TSP phases. However, due to the lack of disaggregated and integrated transit, traffic and signal phase data, previous studies have not investigated the TSP performance at the phase level. This study collects and integrates three archived databases: bus automatic vehicle location (AVL) and automatic passenger count (APC) data, intersection signal phase log data, and vehicle count data. Based on the integrated database, this research proposes innovative and useful performance measures to assess the timeliness and effectiveness of TSP phases to buses that request priority. This study also evaluates the time savings and delays to buses and other vehicles on major and minor streets. Results show that TSP performance varies significantly across intersections. On average, most of the TSP phases were granted timely to buses that request priority, but only a few of them were effective. Early green phases are more...

Friday Transportation Seminars at Portland State University have been a tradition since 2000. With over 450 seminars presented and recorded (access the archive of seminars here), we host both visiting and local scholars to share the latest in research, technology, and implementation in transportation.

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Missed the seminar or want a look back? 

• Watch the recorded video
• View David Soto Padin's slides | View Michael Harpool's slides

David Soto Padín
Graduate Research Assistant at Portland State University, and President of the Students in Transportation Engineering & Planning (ITE-STEP

David...

The video begins at 2:15.

Abstract: If a two-dimensional picture is worth a 1,000 words, how much more can 3D imagery convey? As part of its recently completed Strategic Plan, Metro’s TOD Program in Portland, OR has developed a new GIS -based transit orientation tool to analyze and compare the readiness of its station areas and corridors for higher density mixed-use development.  For the purposes of better capturing a more holistic view of the built environment, this innovative measure expands on the 3 “D’s” of density, diversity, and design by adopting the 5 “P’s” of people, places, physical form, performance and pedestrian/bicycle connectivity. Given the program’s interest in catalyzing near-term private development, it goes further to incorporate a strong “market strength” component. In addition to describing the tool and its future implementation, the presentation will demonstrate how the TOD Program developed and used two- and three-dimensional maps and graphics to help convey the complex methodology and findings to a broad audience of policy makers and stakeholders.

Chris is a Senior TOD Project Manager with Metro’s TOD Program in Portland, OR. Along with managing public-private development projects near transit, he led the recently completed TOD Strategic Plan and is participating in corridor planning region-wide. Prior to Metro, Chris specialized in TOD in the public and private sectors.