Friday, February 27, 2015 - 12:00pm to 1:00pm

Where: Room 204 of the Distance Learning Center Wing of the Urban Center at PSU

Dr. Smaglik is currently working on three separate transportation research projects at Northern Arizona University. This talk will touch briefly on each of the three projects, the concepts behind them, workplans, and expected deliverables. The projects include work with the Oregon DOT on the impact of less than optimal vehicle detection on adaptive control algorithms, development of a ped priority algorithm through a NITC project (as a Portland State subcontractor), and internally funded work on a power harvesting traffic sensor.

Dr. Edward J. Smaglik, P.E. is an Associate Professor at Northern Arizona University (NAU), Flagstaff, AZ, in the Department of Civil Engineering, Construction Management, and Environmental Engineering. Dr. Smaglik has over 7 years of academic research and teaching experience, preceded by 2 years of experience as a post-doctoral research associate. In addition to typical academic teaching responsibilities, he has served as Principal Investigator on transportation related projects on a wide range of topics, including the development and implementation of a pedestrian priority algorithm, the implication of vehicle detection degradation on higher level traffic control algorithms, the analysis of travel time data related to special events, the development of a sustainable traffic sensor, and the analysis of bicycle conflict treatments on motorist / cyclist...

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Friday, March 6, 2015 - 12:00pm to 1:00pm

Where: Room 204 of the Distance Learning Center Wing of the Urban Center at PSU

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...

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Friday, March 13, 2015 - 12:00pm to 1:00pm

Where: Room 204 of the Distance Learning Center Wing of the Urban Center at PSU

Actuated traffic signal control logic has many advantages because of its responsiveness to traffic demands, short cycles, effective use of capacity leading to and recovering from oversaturation, and amenability to aggressive transit priority. Its main drawback has been its inability to provide good progression along arterials. However, the traditional way of providing progression along arterials, coordinated-actuated control with a common, fixed cycle length, has many drawbacks stemming from its long cycle lengths, inflexibility in recovering from priority interruptions, and ineffective use of capacity during periods of oversaturation. This research explores a new paradigm for traffic signal control, “self-organizing signals,” based on local actuated control but with some additional rules that create coordination mechanisms. The primary new rules proposed are for secondary extensions, in which the green may be held to serve an imminently arriving platoon, and dynamic coordination, in which small groups of closely spaced signals communicate with one another to cycle synchronously with the group’s critical intersection. Simulation tests in VISSIM performed on arterial corridors in Massachusetts and Arizona show overall delay reductions of up to 14% compared to an optimized coordinated-actuated scheme where there is no transit priority, and more than 30% in scenarios with temporary...

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Thursday, March 19, 2015 - 10:00am to 11:00am

As cities move to increase levels of bicycling for transportation, many practitioners and advocates have promoted the use of protected bike lanes (also known as “cycle tracks” or “protected bikeways”) as an important component in providing high-quality urban infrastructure for cyclists. These on-street lanes provide more space and physical separation between the bike lane and motor vehicle lane compared with traditional striped bike lanes. However, few U.S. cities have direct experiences with their design and operations, in part because of the limited design guidance provided in the past. There is limited research from North America on protected bike lanes, but preliminary evidence suggests that they can both improve the level of comfort of cyclists and potentially increase the number of people cycling. This research evaluates protected bike lanes in five distinct contexts varying in population, driving and cycling rates and cultures, and weather: Austin, Texas; Chicago, Illinois; Portland, Oregon; San Francisco, California; and, Washington, District of Columbia. 

These five cities participated in the inaugural “Green Lane Project” (GLP) sponsored by...

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Thursday, April 23, 2015 - 10:00pm to 11:00pm

Active travel such as walking and bicycling can lead to health benefits through an increase in physical activity. At the same time, more active travelers breath more and so can experience high pollution inhalation rates during travel. This webinar will review the state of knowledge about how roadway and traffic characteristics impact air pollution risks for bicyclists, including the latest PSU research quantifying bicyclists' uptake of traffic-related air pollution using on-road measurements in Portland. The PSU research team including Alex Bigazzi, Jim Pankow, and Miguel Figliozzi quantified bicyclist exposure concentrations on different types of roadways, respiration responses to exertion level, and changes in blood concentrations of pollutants. Implications for planners, engineers, and policy-makers will be discussed, including guidance for more pollution-conscious bicycle network planning and design. Additionally, ways for individual travelers to reduce their air pollution risks will be discussed.

This 60-minute webinar is eligible for one hour of training...

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Thursday, October 1, 2015 - 10:00pm to 11:00pm

Note: The date of this event is subject to change. It will be in October 2015.

More information coming soon. Check back closer to the date for more details, or sign up for our email newsletter to receive webinar announcements.