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RISDevelopment of a Data-Driven Platform for Transit Performance Measures Using Smart Card and GPS Data
Publisher: American Society of Civil Engineers
Abstract: To improve customer satisfaction and reduce operation costs, transit authorities have been striving to monitor transit service quality and identify the key factors to enhance it. The recent advent of passive data collection ...
Edge-Based Traffic Flow Data Collection Method Using Onboard Monocular Camera
Publisher: ASCE
Abstract: Traffic data collection is the fundamental step in most applications of intelligent transportation systems (ITS). Recently, traffic data collection methods have become more robust and diversified, yet still have some ...
Can Single-Loop Detectors Do the Work of Dual-Loop Detectors?
Publisher: American Society of Civil Engineers
Abstract: Real-time speed and vehicle-classification data are important inputs for modern freeway traffic control and management systems. However, these data are not directly measurable by single-loop detectors. Although dual-loop ...
Link-Journey Speed Estimation for Urban Arterial Performance Measurement Using Advance Loop Detector Data under Congested Conditions
Publisher: American Society of Civil Engineers
Abstract: Travel speed ties directly to travel time, so it is an important measure for quantifying arterial performance. However, accurately estimating link travel speed for urban arterials is difficult because of traffic fluctuations ...
Estimating Rear-End Accident Probabilities at Signalized Intersections: Occurrence-Mechanism Approach
Publisher: American Society of Civil Engineers
Abstract: At signalized intersections, rear-end accidents are frequently the predominant accident type. These accidents result from the combination lead-vehicle deceleration and the ineffective response of the following vehicle’s ...
Simulation-Based Investigation on High-Occupancy Toll Lane Operations for Washington State Route 167
Publisher: American Society of Civil Engineers
Abstract: High-occupancy toll (HOT) lane operation has been implemented in several urban areas in the United States and is regarded as one of the most effective management strategies against freeway congestion. By allowing single ...
Evaluating the Nonlinear Correlation between Vertical Curve Features and Crash Frequency on Highways Using Random Forests
Publisher: ASCE
Abstract: Vertical curve features on interstate highways greatly affect traffic operations and vehicle performance and, thus, could have an impact on the occurrence of traffic crashes. Most studies to date only considered linear ...
Developing a Practical Method to Compute State-Level Bus Occupancy Rate
Publisher: ASCE
Abstract: This work supported the Federal Highway Administration (FHWA) in presenting state and metropolitan area vehicle occupancy information in compliance with Title 23 of the US Code of Federal Regulations, Part 490 National ...
Saturation Flow Rate at the Work Zone–Straddled Intersections with Interweaving Movements: Lane-Based Modeling Study
Publisher: ASCE
Abstract: This study explored how the presence of work zones could influence the saturation flow rate (SFR) prevailing at an intersection. Specifically, it researched construction-ridden intersections with interweaving movements ...
Estimating a Demographic Profile for the Central Puget Sound Region Freeway Network
Publisher: ASCE
Abstract: Freeways play a critical role in the transportation network. They also present several equity concerns for the users and communities they serve. Thus, it is critical to have a concrete understanding of the populations that ...