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Civil and Environmental Engineering Commons™
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Full-Text Articles in Civil and Environmental Engineering
Evaluating Pedestrian Service Of The New Super Diverging Diamond Interchange On Three Case Study Sites In Denver, Colorado, Muhammad Tahmidul Haq, Amirarsalan Mehrara Molan, Khaled Ksaibati
Evaluating Pedestrian Service Of The New Super Diverging Diamond Interchange On Three Case Study Sites In Denver, Colorado, Muhammad Tahmidul Haq, Amirarsalan Mehrara Molan, Khaled Ksaibati
Faculty and Student Publications
Ensuring safe and comfortable conditions for pedestrians necessitates specific strategies at intersections and service interchanges where traffic and pedestrians interact in complex ways with other modes of transportation. This study aims to investigate pedestrian performance at the new Super Diverging Diamond Interchange (Super DDI) using real-world locations (i.e., I-225 and Mississippi Ave, I-25 and 120th Ave, and I-25 and Hampden Ave in Denver, Colorado). Three alternative designs, typical DDI, and two versions of Super DDI were considered to make a reasonable comparison with the existing Conventional Diamond Interchange (CDI). A comprehensive series of simulation models (192 scenarios with 960 runs) …
A Framework For Estimating Future Traffic Operation And Safety Performance Of Restricted Crossing U-Turn (Rcut) Intersections, Amirarsalan M. Molan, Jonathan Howard, Mouyid Islam, Anurag Pande
A Framework For Estimating Future Traffic Operation And Safety Performance Of Restricted Crossing U-Turn (Rcut) Intersections, Amirarsalan M. Molan, Jonathan Howard, Mouyid Islam, Anurag Pande
Faculty and Student Publications
Background: Despite numerous studies demonstrating the effectiveness of Restricted Crossing U-Turn (RCUT) intersection design, its implementation remains uneven and close to zero in some large states, including California. This paper provides a comprehensive framework to estimate the operational and safety performance of future RCUT designs. The framework is demonstrated for a geometrically constrained intersection located on a highspeed rural expressway. The operational evaluation relies on microscopic simulation models of existing TWSC and alternate RCUT designs used to estimate network-wide performance measures. Methods: Two approaches are demonstrated for future safety estimation; first, an HSM-prescribed Empirical Bayes (EB) approach that uses Safety …
Microscopic Traffic Simulation As A Decision Support System For Road Diet And Tactical Urbanism Strategies, Bernice Liu, Amirarsalan Mehrara Molan, Anurag Pande, Jonathan Howard, Serena Alexander, Zhiliang Lou
Microscopic Traffic Simulation As A Decision Support System For Road Diet And Tactical Urbanism Strategies, Bernice Liu, Amirarsalan Mehrara Molan, Anurag Pande, Jonathan Howard, Serena Alexander, Zhiliang Lou
Faculty and Student Publications
Urban street networks in the United States have been primarily designed for automobile traffic with negligible considerations to non-motorized transportation users. Due to environmental issues and quality of life concerns, communities are reclaiming street spaces for active modes and slowing the speeds in their downtown. Moreover, tactical urbanism, i.e., the use of street space for innovative purposes other than moving automobile traffic, is becoming attractive due to reduced automobile travel demand and the need for outdoor activities in the age of the COVID-19 pandemic. This study provides details of the modeling of an urban downtown network (in the City of …