Improving Accuracy and Precision of Bicycle Volume Estimates Using Advanced Machine Learning Approaches
Sirisha Kothuri
Banafsheh Rekabdar
This study seeks to improve modeling methods for estimating bicycle volumes. Better estimates of bicycle activity on local road and trail networks can help agencies prioritize projects, plan and design new bicycle infrastructure, and conduct safety a ...
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Risk-Based Methodology for Structural Evaluation of Bridge-Sized Culverts
David Yang
Kevin White , Timothy Wood
Many long-span culverts are subject to loads from heavy trucks, and thus need to be evaluated for their load carrying capacities to estimate safety margins. However, the current manual on bridge evaluation provides limited guidance for bridge-sized c ...
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Improving Guidance for Automated Speed Enforcement
Miguel Andres Figliozzi
PROBLEM SUMMARY
Fatal and severe injury crashes are on the rise in Oregon with one of the prominent factors being excessive speeding. As many cities and communities expand walking and cycling infrastructure there has been an increase in pedestrian ...
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Portland SMART Grant: Zero Emission Delivery Zones
John MacArthur
Nathan McNeil
In Spring 2023, the Portland Bureau of Transportation (PBOT) was awarded a Stage-1 grant under the Strengthening Mobility and Revolutionizing Transportation (SMART) Grants Program by the US DOT, titled “Decarbonizing Goods Movement: A Technology-En ...
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Validation of the New Speed Zoning Method for Urban Arterials and High-Speed Roadways in Terms of Speed Compliance and Safety Outcomes
Jason Anderson
The evaluation of the current ODOT methodology will focus on higher speed roadways such as arterials and roadways with a record of high severity injuries. This will require investigating ways agencies have found to balance between local safety needs ...
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Exploring the Use of Crowdsourced Data Sources for Pedestrian Count Estimations
Sirisha Kothuri
Nathan McNeil , Kate Hyun , Stephen Mattingly
Counts provide the foundation for measuring nonmotorized travel along a link or a network and are also useful for monitoring trends, planning new infrastructure, and for conducting safety, health, and economic analyses. For safety analysis, they are ...
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Developing Guidance On Leading Pedestrian Intervals And Curb Extensions To Improve Pedestrian Safety At Signalized Intersections
David Hurwitz
Christopher Monsere
Improving pedestrian safety continues to be critically important to ODOT’s mission to provide a safe and reliable multimodal transportation system. Approximately 920 pedestrians were injured, and 78 pedestrians were killed in Oregon each year betwe ...
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Taxing Shared Micromobility: Assessing The Global Landscape Of Fees And Taxes And Their Implications For Cities, Riders, And Operators
John MacArthur
Shared micromobility (including shared electric scooters and bikes provided by private companies) is one of the newest transportation options that has come to cities in the last several decades. A new report explores the different ways cities charge ...
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Trends and Challenges Posed by Medium-Duty Trucks to the Operation and Safety of Oregon Highways
Miguel Andres Figliozzi
The primary goal of this initiative is to provide the agency with a comprehensive understanding of medium-duty truck operation, identification of potential areas of risk, forecast of future operational growth and monetization of the costs associated ...
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The Effect of Vehicle Mix on Crash Frequency and Crash Severity (NCHRP 22-49)
Tanmoy Bhowmik
Crash prediction analysis focuses on identifying attributes that result in traffic crashes and proposes effective countermeasures to improve the roadway design and operational attributes. These crash frequency models are typically employed for examin ...
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PeopleForBikes National E-bike Survey
John MacArthur
Portland State University has conducted a North American survey of e-bike owners. The primary objective of this study is to gain a better understanding of the factors that influence purchase and use of e-bikes from existing users. Understanding who u ...
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Subcontract: NCHRP 15-73 Design Options to Reduce Turning Motor Vehicle – Bicycle Conflicts at Controlled Intersections
Christopher Monsere
Sirisha Kothuri , Nathan McNeil
BACKGROUND
One of the most common locations for fatal motor vehicle-bicyclist crashes is at intersections, which inherently have a large number of turning conflicts. Reducing these conflicts is a key objective in improving intersection safety acr ...
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