A Microsimulation Analysis Of The Mobility Impacts Of Intersection Ramp Metering
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A Microsimulation Analysis Of The Mobility Impacts Of Intersection Ramp Metering
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Author : William Jared Wall
language : en
Publisher:
Release Date : 2013
A Microsimulation Analysis Of The Mobility Impacts Of Intersection Ramp Metering written by William Jared Wall and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
Urban freeway demand that frequently exceeds capacity has caused many agencies to consider many options to reduce congestion. A series of solutions that falls under the Active Traffic Management (ATM) banner have shown promising potential. Perhaps the most popular ATM strategy is ramp metering. Ramp metering involves limiting the access of vehicles to freeways at an entrance ramp. By doing this, freeway throughput, speeds, and travel time reliability can be increased, while the number of traffic incidents can be decreased. This study examines the application of an innovative ramp metering strategy, Intersection Ramp Metering (IRM), at a section of Loop 1 in Austin, TX. IRM implements the ramp metering function at the intersection immediately upstream of the entrance ramp, rather than on the ramp itself. A microsimulation analysis of this application is performed in VISSIM, and the results confirm that freeway throughput (+10%), and system average travel time (-14%), can be improved, as well as several other performance measures.
Computer Aided Systems Theory Eurocast 2019
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Author : Roberto Moreno-Díaz
language : en
Publisher: Springer Nature
Release Date : 2020-04-15
Computer Aided Systems Theory Eurocast 2019 written by Roberto Moreno-Díaz and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-04-15 with Computers categories.
The two-volume set LNCS 12013 and 12014 constitutes the thoroughly refereed proceedings of the 17th International Conference on Computer Aided Systems Theory, EUROCAST 2019, held in Las Palmas de Gran Canaria, Spain, in February 2019. The 123 full papers presented were carefully reviewed and selected from 172 submissions. The papers are organized in the following topical sections: Part I: systems theory and applications; pioneers and landmarks in the development of information and communication technologies; stochastic models and applications to natural, social and technical systems; theory and applications of metaheuristic algorithms; model-based system design, verification and simulation. Part II: applications of signal processing technology; artificial intelligence and data mining for intelligent transportation systems and smart mobility; computer vision, machine learning for image analysis and applications; computer and systems based methods and electronic technologies in medicine; advances in biomedical signal and image processing; systems concepts and methods in touristic flows; systems in industrial robotics, automation and IoT.
Work Zone Impacts Assessment
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Author :
language : en
Publisher:
Release Date : 2006
Work Zone Impacts Assessment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Road work zones categories.
Impact Of Employer Based Programs On Transit System Ridership And Transportation System Performance
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Author :
language : en
Publisher:
Release Date : 2007
Impact Of Employer Based Programs On Transit System Ridership And Transportation System Performance written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Transportation demand management categories.
Traffic And Mobility
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Author : Werner Brilon
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Traffic And Mobility written by Werner Brilon and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Mathematics categories.
Anyone who reflects on the future of society cannot do so without at the same time thinking about the future of our transportation systems. The dilemma is obvious. On the one hand, mobility must be maintained as it is crucial to economic development and because people are eager for individual mobility. On the other hand, traffic imposes heavy burdens on people and on the environment, on cities and communities and on our national economies. Finding a solution to that dilemma seems to be difficult, in fact we have not even developed a rough idea of how it could look like. This is why the North Rhine-Westphalia Science and Research Ministry came up with the plan to work out a well-founded scientific basis on which to solve the problems inherent in our transport system. A research network has been established and sponsored with government funds for a period of three years with a view to realising that objective. The "Traffic Simulation and Environmental Impact" research network is composed of researchers who have an excellent reputation as North Rhine-Westphalia traffic experts. Cutting across various disciplines of knowledge, the network aims to integrate transportation and natural sciences, particularly physics and mathematics, in a move to profit by the synergy between technical know-how and innovative methodology. The present volume is intended as a progress report and a prologue to the forthcoming international colloquium which represents the highlight and at the same time the end of the three-year project funding period.
Proceedings Of The Fifth International Conference Of Transportation Research Group Of India
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Author : Akhilesh Kumar Maurya
language : en
Publisher: Springer Nature
Release Date : 2022-03-05
Proceedings Of The Fifth International Conference Of Transportation Research Group Of India written by Akhilesh Kumar Maurya and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-05 with Technology & Engineering categories.
This book (in three volumes) comprises the proceedings of the Fifth Conference of Transportation Research Group of India (CTRG2019) focusing on emerging opportunities and challenges in the field of transportation of people and freight. The contents of the volume include characterization of conventional and innovative pavement materials, operational effects of road geometry, user impact of multimodal transport projects, spatial analysis of travel patterns, socio-economic impacts of transport projects, analysis of transportation policy and planning for safety and security, technology enabled models of mobility services, etc. This book will be beneficial to researchers, educators, practitioners and policy makers alike.
Evaluation Of The Mobility Impacts Of Proposed Ramp Metering And Merge Control Systems
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Author : Michael DeGaspari
language : en
Publisher:
Release Date : 2012
Evaluation Of The Mobility Impacts Of Proposed Ramp Metering And Merge Control Systems written by Michael DeGaspari and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Increasing demand on freeway facilities is a major challenge facing urban areas in the United States and throughout the world. Active Traffic Management (ATM) strategies can be used to increase the performance of these facilities through improved operations without the significant expenditure associated with adding capacity. One ATM strategy that has been widely deployed in the current state of practice is ramp metering, which controls the traffic demand placed on a freeway. Merge control strategies are less prevalent and largely undeveloped. This study examines the recurrently congested northbound section of Interstate Highway 35 that approaches downtown Austin, Texas. Using the VISSIM microsimulation platform, a model of this segment was developed and calibrated to reflect current peak-hour congestion. Within this model, ramp metering and merge control technologies were implemented. The impacts on traffic throughput, speed and travel time for each of these proposed systems are evaluated.
Evaluation Of Mobility Impacts Of Temporary Ramp Metering In Work Zones
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Author : Naghma Hassan
language : en
Publisher:
Release Date : 2012
Evaluation Of Mobility Impacts Of Temporary Ramp Metering In Work Zones written by Naghma Hassan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Road maintenance has been growing in the United States and brings a variety of challenges to the transportation profession. Work zone congestion is one of the most important factors contributing to the delay and safety of freeways. Many control methodologies have been applied to work zones in order to reduce freeway congestion and delay. One means of control is ramp metering, which has been deployed since 1963 in the United States and has proven to be successful. This thesis' objective is to evaluate and simulate the effect of ramp metering on freeway work zones; traffic performance measures such as delay, speed, and number of stops are used for the evaluation. A literature review showed that a main factor contributing to the freeway work zone delay is a high percentage of commercial trucks. Due to the role of truck percentage in work zone performance, effectiveness of ramp metering in work zone control is evaluated with different truck percentages. The lane configuration for all the studied sites work zones was 2 lanes to 1 lane, because it's frequency in real-world applications. In the evaluation of ramp metering in work zones, the traffic volumes investigated were less than, equal to, and more than capacity (650vph, 1240vph, and 1854vph). Mainline (a link used for trough traffic) truck percentage and ramp truck percentage varied from 10% to 40%, and 10% to 20%, respectively. As a result, a total of 8 cases were created and simulated using VISSIM traffic simulation software.
Optimization And Microsimulation Of On Ramp Metering For Congested Freeways
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Author : Gabriel Clemente Gomes
language : en
Publisher:
Release Date : 2004
Optimization And Microsimulation Of On Ramp Metering For Congested Freeways written by Gabriel Clemente Gomes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Express highway interchanges categories.
This dissertation investigates various aspect of the design and testing of on-ramp metering control systems, including optimization-based control and microscopic freeway modeling. A new technique for generating optimal metering plans is developed. As with most predictive designs, the ramp metering rates are found as the solution to a nonlinear optimization problem. In contrast to previous designs, the new approach 1) produces a globally optimal solution to the nonlinear problem, 2) requires only to solve a single linear program, and 3) allows the enforcement of hard constraints on the on-ramp queue lengths. The price that is paid for these features is that the objective function being minimized is not Total Travel Time, but rather a member of a class of "TTT-like" objective functions. A TTT-like objective function is defined as a linear combination of mainline flows with weights that, similarly to the Total Travel Time cost weights, decrease linearly in time from some initial value to zero at the final time. An example application of the technique shows that the globally optimal metering plan with respect to a TTT-like objective function also performs well in terms of Total Travel Time. A macroscopic analysis of local traffic-responsive ramp metering on a short stretch of freeway, with a single on-ramp and no offramps, is also presented. The study compares the performance of two popular local traffic-responsive ramp metering algorithms: Alinea and Percent-Occupancy, and addresses issues pertaining to parameter tuning and loop-detector placement. The second half of the dissertation describes the construction of a detailed microsimulation model of a stretch of Interstate 210 in Pasadena, CA. The VISSIM microsimulation package was used to create this model. Descriptions of the data gathering and processing procedures, bottleneck identification, network coding, and model calibration are provided. The model is used to test the performance of candidate local traffic-responsive controllers. Questions concerning the relative merits of these controllers, parameter tuning, and loop-detector placement are addressed in the context of the large-scale microscopic model.
Evaluation And Improvement Of The Stratified Ramp Metering Algorithm Through Microscopic Simulation
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Author : Panos G. Michalopoulos
language : en
Publisher:
Release Date : 2005
Evaluation And Improvement Of The Stratified Ramp Metering Algorithm Through Microscopic Simulation written by Panos G. Michalopoulos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Computer algorithms categories.
A new ramp metering strategy implemented on the Twin Cities freeway system to reduce ramp waiting times was evaluated through microsimulation of freeway activity. The study compared Stratified Ramp Metering strategy with the previous Zone Metering Strategy and with no control strategy. Comparison with Zone, which was designed to favor freeway flow, showed the new strategy succeeded in greatly reducing ramp delays and lines. When compared to the results of no control strategy, it reduces freeway travel time, increases freeway speed, smoothes the flow of traffic, and reduces the number of stops. However, travel time, fuel consumption and pollutant emissions are unpredictable under the newer system. Compared to no control strategy, such measures of effectiveness may improve or worsen depending on the freeway patterns and demand. Based on these findings, the researchers will seek improvements to the design of the Stratified Ramp Metering algorithm so as to factor in disruptive traffic patterns.