Sirisha Kothuri
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View article: How was your Crossing Experience? Development of a Pedestrian Satisfaction with Unsignalized Crossings Scale
How was your Crossing Experience? Development of a Pedestrian Satisfaction with Unsignalized Crossings Scale Open
Unsignalized pedestrian crossing accommodations can improve pedestrian safety, yet their quality of service for pedestrians remains understudied. The present study explored whether and how pedestrians’ satisfaction with crossing unsignaliz…
View article: Data From: Active Transportation Counts from Existing On-Street Signal and Detection Infrastructure
Data From: Active Transportation Counts from Existing On-Street Signal and Detection Infrastructure Open
This study’s objective was to use data from existing traffic signal infrastructure to estimate pedestrian volumes. Pedestrian push-button actuations were collected from signal controller logs at 49 intersections in western Oregon and an ad…
View article: Pedestrian Behavior Study to Advance Pedestrian Safety in Smart Transportation Systems Using Innovative LiDAR Senso
Pedestrian Behavior Study to Advance Pedestrian Safety in Smart Transportation Systems Using Innovative LiDAR Senso Open
Pedestrian safety is critical to improving walkability in cities. Although walking trips have increased in the last decade, pedestrian safety remains a top concern. In 2020, 6,516 pedestrians were killed in traffic crashes, representing th…
View article: Effect of Residential Street Speed Limit Reduction on Driving Speeds in Portland, Oregon
Effect of Residential Street Speed Limit Reduction on Driving Speeds in Portland, Oregon Open
This study analyzed the impacts on motor vehicle observed speeds following a residential speed limit reduction from 40.23 km/hr (25 mi/hr) to 32.19 km/hr (20 mi/hr) in Portland, OR that was accompanied by a public awareness and signage cam…
View article: Exploring Data Fusion Techniques to Estimate Network-Wide Bicycle Volumes
Exploring Data Fusion Techniques to Estimate Network-Wide Bicycle Volumes Open
This research developed a method for evaluating and integrating emerging sources (Strava, StreetLight, and Bikeshare) of bicycle activity data with conventional demand data (permanent counts, short-duration counts) using traditional (Poiss…
View article: Impact of COVID-19 on Traffic Signal Systems: Survey of Agency Interventions and Observed Changes in Pedestrian Activity
Impact of COVID-19 on Traffic Signal Systems: Survey of Agency Interventions and Observed Changes in Pedestrian Activity Open
The COVID-19 pandemic, the most significant public health crisis since the 1918–1919 influenza epidemic, is the first such event to occur since the development of modern transportation systems in the twentieth century. Many states across t…
View article: Measuring Pedestrian Level of Stress in Urban Environments: Naturalistic Walking Pilot Study
Measuring Pedestrian Level of Stress in Urban Environments: Naturalistic Walking Pilot Study Open
Walking is the most basic and sustainable mode of transportation, and many jurisdictions would like to see increased walking rates as a way of reducing congestion and emission levels and improving public health. In the United States, walki…
View article: Data-Driven Mobility Strategies for Multimodal Transportation
Data-Driven Mobility Strategies for Multimodal Transportation Open
Multimodal transportation systems (e.g., walking, cycling, automobile, public transit, etc.) are effective in increasing people’s travel flexibility, reducing congestion, and improving safety. Therefore, it is critical to understand what f…
View article: Online Survey of Driver Comprehension of the Flashing Yellow Arrow for Right-Turn Signal Indications
Online Survey of Driver Comprehension of the Flashing Yellow Arrow for Right-Turn Signal Indications Open
This paper presents the results of an online survey of licensed driver comprehension of the right-turn signal displays with a focus on the flashing yellow arrow (FYA) and also including the circular green and red and red arrow. Recruitment…
View article: Understanding Factors Affecting Arterial Reliability Performance Metrics
Understanding Factors Affecting Arterial Reliability Performance Metrics Open
In recent years, the importance of travel time reliability has become equally important as average travel time. However, the majority focus of travel time research is average travel time or travel time reliability on freeways. In addition,…
View article: Eliminating the Right Hook: Safer Intersections for Bikes
Eliminating the Right Hook: Safer Intersections for Bikes Open
Over the last decade there has been increased interest in promoting active and sustainable transportation modes such as bicycling and walking especially in urban areas, as a means to alleviate congestion, lower emission levels and improve …
View article: Improving Bicycle Crash Prediction for Urban Road Segments
Improving Bicycle Crash Prediction for Urban Road Segments Open
The 2010 Highway Safety Manual (HSM) provides methods for predicting the number of motor vehicle crashes on various roadway facilities. However, it includes only a rudimentary method for predicting the number of bicycle-related crashes. De…
View article: Webinar: Improving Walkability at Signalized Intersections with Signal Control Strategies
Webinar: Improving Walkability at Signalized Intersections with Signal Control Strategies Open
The goal of signal timing at an intersection should be to maximize efficiency for all users. In many jurisdictions, however, traffic signals are timed mostly with the goal of reducing vehicular delay.\nOther road users, such as pedestrians…
View article: Leading Pedestrian Interval Implementation as a Marginal Costs and Benefits Problem
Leading Pedestrian Interval Implementation as a Marginal Costs and Benefits Problem Open
To improve the safety of people walking at particular signalized intersections, traffic signal engineers may implement leading pedestrian intervals (LPI) to provide pedestrians with a walk signal for a few seconds prior to the parallel veh…