Files

Download

Download Presentation (1.2 MB)

Streaming Media

Date

3-6-2015

Description

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 effective than green extension phases because too many green extension phases were granted late. For each early green phase, the total passenger time savings for buses and other vehicles on major streets is much higher than the delay to vehicles on minor streets. However, for each green extension phase, the total time savings on major streets is almost equal to the total delay on minor streets.

Biographical Information

Wei Feng is a performance analyst at Chicago Transit Authority. He is a PSU alumnus; he graduated from the Transportation Engineering program here at PSU. His research interests include public transit service reliability, intelligent transportation systems and freight transportation. Currently, he mainly focuses on analyzing factors that affect transit service reliability and strategies to improve service reliability.

Wei Feng's seminar is sponsored by the NITC visiting scholar program.

Subjects

Intelligent transportation systems -- Oregon, Local transit -- Technological innovations -- Oregon, Travel time (Traffic engineering), Traffic signal control systems, Transit traffic, Intelligent control systems

Disciplines

Transportation | Urban Studies | Urban Studies and Planning

Persistent Identifier

http://archives.pdx.edu/ds/psu/18244

Empirical Evaluation of Transit Signal Priority through Fusion of Heterogeneous Transit and Traffic Signal Data and Novel Performance Measures

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.