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• 1. [Article] Utilizing High-Resolution Archived Transit Data to Study Before-and-After Travel-Speed and Travel-Time Conditions

  Travel times, operating speeds, and service reliability influence costs and service attractiveness. This research outlines an approach to quantify how these metrics change after a modification of roadway ...

  Citation × Citation Citation Abstract Copy Title: Utilizing High-Resolution Archived Transit Data to Study Before-and-After Travel-Speed and Travel-Time Conditions Author: Glick, Travis B Year: 2017 Travel times, operating speeds, and service reliability influence costs and service attractiveness. This research outlines an approach to quantify how these metrics change after a modification of roadway design or transit routes using archived transit data. The Tri-County Metropolitan Transportation District of Oregon (TriMet), Portland’s public transportation provider, archives automatic vehicle location (AVL) data for all buses as part of their bus dispatch system (BDS). This research combines three types of AVL data (stop event, stop disturbance, and high-resolution) to create a detailed account of transit behavior; this probe data gives insights into the behavior of transit as well as general traffic. The methodology also includes an updated approach for confidence intervals estimates that more accurately represent of range of speed and travel time percentile estimates. This methodology is applied to three test cases using a month of AVL data collected before and after the implementation of each roadway change. The results of the test cases highlight the broad applicability for this approach to before-and-after studies. Title: Utilizing High-Resolution Archived Transit Data to Study Before-and-After Travel-Speed and Travel-Time Conditions Author: Glick, Travis B Year: 2017 Travel times, operating speeds, and service reliability influence costs and service attractiveness. This research outlines an approach to quantify how these metrics change after a modification of roadway design or transit routes using archived transit data. The Tri-County Metropolitan Transportation District of Oregon (TriMet), Portland’s public transportation provider, archives automatic vehicle location (AVL) data for all buses as part of their bus dispatch system (BDS). This research combines three types of AVL data (stop event, stop disturbance, and high-resolution) to create a detailed account of transit behavior; this probe data gives insights into the behavior of transit as well as general traffic. The methodology also includes an updated approach for confidence intervals estimates that more accurately represent of range of speed and travel time percentile estimates. This methodology is applied to three test cases using a month of AVL data collected before and after the implementation of each roadway change. The results of the test cases highlight the broad applicability for this approach to before-and-after studies. Close

• 2. [Article] How Livable is Your Transit System?

  The U.S. Department of Housing and Urban Development has identified some “livability principles” which include healthy, safe and walkable neighborhoods and safe, reliable and economical transportation ...

  Citation × Citation Citation Abstract Copy Title: How Livable is Your Transit System? Author: Schlossberg, Marc Year: 2014 The U.S. Department of Housing and Urban Development has identified some “livability principles” which include healthy, safe and walkable neighborhoods and safe, reliable and economical transportation choices. Transit agencies and local governments routinely use metrics to evaluate the performance of transit systems, but a uniform standard of transit data collection does not exist outside of the reporting requirements of the National Transit Database (NTD). Because of the types of data collected for the NTD, the focus of performance measurements is often on ridership and financial performance, leaving aside the question of livability. In an OTREC-sponsored project, principal investigator Marc Schlossberg of the University of Oregon, along with co-investigators Jennifer Dill of Portland State University and Nico Larco, also of the University of Oregon, set out to create a set of tested and refined performance indicators that transit agencies across the nation can use to evaluate and improve their system performance in relation to livability goals. Title: How Livable is Your Transit System? Author: Schlossberg, Marc Year: 2014 The U.S. Department of Housing and Urban Development has identified some “livability principles” which include healthy, safe and walkable neighborhoods and safe, reliable and economical transportation choices. Transit agencies and local governments routinely use metrics to evaluate the performance of transit systems, but a uniform standard of transit data collection does not exist outside of the reporting requirements of the National Transit Database (NTD). Because of the types of data collected for the NTD, the focus of performance measurements is often on ridership and financial performance, leaving aside the question of livability. In an OTREC-sponsored project, principal investigator Marc Schlossberg of the University of Oregon, along with co-investigators Jennifer Dill of Portland State University and Nico Larco, also of the University of Oregon, set out to create a set of tested and refined performance indicators that transit agencies across the nation can use to evaluate and improve their system performance in relation to livability goals. Close

• 3. [Article] Estimating Reliability Indices and Confidence Intervals for Transit and Traffic at the Corridor Level

  As congestion worsens, the importance of rigorous methodologies to estimate travel-time reliability increases. Exploiting fine-granularity transit GPS data, this research proposes a novel method to estimate ...

  Citation × Citation Citation Abstract Copy Title: Estimating Reliability Indices and Confidence Intervals for Transit and Traffic at the Corridor Level Author: Glick, Travis B Year: 2017 As congestion worsens, the importance of rigorous methodologies to estimate travel-time reliability increases. Exploiting fine-granularity transit GPS data, this research proposes a novel method to estimate travel-time percentiles and confidence intervals. Novel transit reliability measures based on travel-time percentiles are proposed to identify and rank low-performance hotspots; the proposed reliability measures can be utilized to distinguish peak-hour low performance from whole-day low performance. As a case study, the methodology is applied to a bus transit corridor in Portland, Oregon. Time-space speed profiles, heatmaps, and visualizations are employed to highlight sections and intersections with high travel-time variability and transit low performance. Segment and intersection travel-time reliability are contrasted against analytical delay formulas at intersections with positive results. If bus stop delays are removed, this methodology can also be applied to estimate regular traffic travel-time variability. Title: Estimating Reliability Indices and Confidence Intervals for Transit and Traffic at the Corridor Level Author: Glick, Travis B Year: 2017 As congestion worsens, the importance of rigorous methodologies to estimate travel-time reliability increases. Exploiting fine-granularity transit GPS data, this research proposes a novel method to estimate travel-time percentiles and confidence intervals. Novel transit reliability measures based on travel-time percentiles are proposed to identify and rank low-performance hotspots; the proposed reliability measures can be utilized to distinguish peak-hour low performance from whole-day low performance. As a case study, the methodology is applied to a bus transit corridor in Portland, Oregon. Time-space speed profiles, heatmaps, and visualizations are employed to highlight sections and intersections with high travel-time variability and transit low performance. Segment and intersection travel-time reliability are contrasted against analytical delay formulas at intersections with positive results. If bus stop delays are removed, this methodology can also be applied to estimate regular traffic travel-time variability. Close

• 4. [Article] Evaluating the Planning and Implementation of Major Transit Capital Projects in the Portland Region

  The Federal Transit Administration's (FTA) discretionary New Starts program is the federal government's largest discretionary funding program. From heavy to light rail, from commuter rail to bus rapid ...

  Citation × Citation Citation Abstract Copy Title: Evaluating the Planning and Implementation of Major Transit Capital Projects in the Portland Region Author: Recker, Joseph Year: 2014 The Federal Transit Administration's (FTA) discretionary New Starts program is the federal government's largest discretionary funding program. From heavy to light rail, from commuter rail to bus rapid transit systems, the FTA's New Starts program has helped to make possible hundreds of new or extended transit fixed guideway systems across the country, including most of TriMet’s light rail extensions and WES commuter rail. Beginning in 2001, FTA has required project sponsors to prepare a Before and After Study report on the effectiveness of planning and implementation of New Starts and Small Starts projects. The studies focus on five transit characteristics – project scope, capital costs, operating and maintenance costs, service levels, and ridership behavior – and compares these characteristics at various planning milestones, as well as before and after implementation of the project. TriMet, in conjunction with FTA, has completed or nearly completed Before and After Study reports for three projects – Interstate MAX, WES Commuter Rail, and the Green Line – and is in the process of working on two more. This presentation will briefly describe the federal New Starts program, FTA requirements for Before and After Studies, summarize findings from the three TriMet studies and provide comparisons with other completed New Starts projects across the U.S. Title: Evaluating the Planning and Implementation of Major Transit Capital Projects in the Portland Region Author: Recker, Joseph Year: 2014 The Federal Transit Administration's (FTA) discretionary New Starts program is the federal government's largest discretionary funding program. From heavy to light rail, from commuter rail to bus rapid transit systems, the FTA's New Starts program has helped to make possible hundreds of new or extended transit fixed guideway systems across the country, including most of TriMet’s light rail extensions and WES commuter rail. Beginning in 2001, FTA has required project sponsors to prepare a Before and After Study report on the effectiveness of planning and implementation of New Starts and Small Starts projects. The studies focus on five transit characteristics – project scope, capital costs, operating and maintenance costs, service levels, and ridership behavior – and compares these characteristics at various planning milestones, as well as before and after implementation of the project. TriMet, in conjunction with FTA, has completed or nearly completed Before and After Study reports for three projects – Interstate MAX, WES Commuter Rail, and the Green Line – and is in the process of working on two more. This presentation will briefly describe the federal New Starts program, FTA requirements for Before and After Studies, summarize findings from the three TriMet studies and provide comparisons with other completed New Starts projects across the U.S. Close