A Framework For Simulating Variable Speed Limit Algorithms In Corsim
DOWNLOAD
Download A Framework For Simulating Variable Speed Limit Algorithms In Corsim PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get A Framework For Simulating Variable Speed Limit Algorithms In Corsim book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
A Framework For Simulating Variable Speed Limit Algorithms In Corsim
DOWNLOAD
Author : Clark Letter
language : en
Publisher:
Release Date : 2011
A Framework For Simulating Variable Speed Limit Algorithms In Corsim written by Clark Letter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
ABSTRACT: A major problem associated with freeway operations around major cities is congestion occurrence during peak volume periods. Typically, bottlenecks at merging and diverging junctions as well as incidents create a shockwave that propagates upstream. One of the tools currently examined as a way to dampen the shockwave produced by this bottleneck is variable speed limits (VSL). Current micro-simulators do not provide an interface to easily simulate VSLs and evaluate their impact on traffic, thus simulation must be carried out through additional coding. This study creates a test-bed for simulating and evaluating multiple VSL algorithms using the Corridor Simulation (CORSIM) micro-simulator. Three algorithms for VSL control are selected and simulated to evaluate the effectiveness of each algorithm. The roadway used for the simulation is a 13-mile section of I-95 in Miami, Florida. A run-time extension (RTE) interface is built to communicate with the CORSIM simulation and replicate the VSL operations. Different threshold values are tested to evaluate the effectiveness of each algorithm under various settings. It was concluded that all but one of the scenarios tested show an improvement in the average travel speed and total travel time after VSL is implemented. The throughput for most scenarios showed an improvement when observed over the time duration of the congestion. Overall, the volume-based algorithm showed the most improvement in the simulations.
Informs Conference Program
DOWNLOAD
Author : Institute for Operations Research and the Management Sciences. National Meeting
language : en
Publisher:
Release Date : 2001
Informs Conference Program written by Institute for Operations Research and the Management Sciences. National Meeting and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Industrial management categories.
Using Connected Vehicles In Variable Speed Limit Systems
DOWNLOAD
Author : Ellen F. Grumert
language : en
Publisher: Linköping University Electronic Press
Release Date : 2018-04-10
Using Connected Vehicles In Variable Speed Limit Systems written by Ellen F. Grumert and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-10 with categories.
Motorway traffic management systems are useful for improving the traffic conditions on urban motorways. One of the most common motorway traffic management systems are variable speed limit systems. These systems adapt the speed limits based on the prevailing traffic conditions measured by roadside detectors and recommended or compulsory speed limits are shown on variable message signs installed on gantries over the road.Thesystems consist of three parts; the control algorithm used to determine which speed limit to be displayed, a method for estimating the traffic conditions to be used as input for the control algorithm and the infrastructure for application of the variable speed limits. The goal of the systems is often to increase safety or efficiency. Recent development in the field of connected vehicles have opened up for a new type of data source, as the status of a connected vehicle and its surroundings can be communicated at arbitrary locations. Hence, by the use of connected vehicles in variable speed limit systems there is a potential of reducing the amount of roadside equipment. It is even possible to control the connected vehicles towards the current speed limit without the use of variable message signs. This allows for the application of variable speed limits at arbitrary locations. The aim of this thesis is to examine how connected vehicles can be used to improve the efficiency of variable speed limit systems. The thesis contribute with new and improved methods using connected vehicles in all three parts of a variable speed limit system. The suggested methods are evaluated by microscopic traffic simulation. The overall conclusion is that the use of connected vehicles in variable speed limit systems can contribute to improvements in traffic efficiency compared to existing systems. The six papers included in the thesis can be summarized as follows. First, it is shown that traditional variable speed limit systems can be effective for improving the traffic conditions on the motorway and the results can be comparable to more costly alterations by reconstruction of the infrastructure to increase the capacity. Next, the usefulness of connected vehicles for application and control of the speed limits in an existing variable speed limit system is investigated. It is concluded that the design of the control algorithm and the accuracy of the estimated traffic conditions have a great effect on the final outcome of the system. The design of the control algorithm is then examined by evaluation of a number of control algorithms with respect to safety, efficiency and environmental impacts. The main benefits and drawbacks of the algorithms are highlighted and desirable characteristics to include when designing a control algorithm are identified. In two studies, methods making use of connected vehicles for estimating the traffic conditions are proposed. The results show that connected vehicles are useful for improving the accuracy of the estimated traffic conditions through the inclusion of more detailed information and information at locations where detector measurements are not available. Finally, a variable speed limit system is proposed in which connected vehicles play a central role in the estimation of the traffic conditions, as well as in the control algorithm and for application of the speed limit. The system is shown to be useful for improving traffic efficiency during an incident at an arbitrary location along the controlled road.
Le Canard L Orange
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1975
Le Canard L Orange written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.
A Simulation Study Of Variable Speed Limits And Incident Induced Congestion
DOWNLOAD
Author : Steven Drew Cooper
language : en
Publisher:
Release Date : 2010
A Simulation Study Of Variable Speed Limits And Incident Induced Congestion written by Steven Drew Cooper and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Variable speed limits categories.
Improving Intersection Safety Through Variable Speed Limits For Connected Vehicles
DOWNLOAD
Author : Michael W. Levin
language : en
Publisher:
Release Date : 2019
Improving Intersection Safety Through Variable Speed Limits For Connected Vehicles written by Michael W. Levin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Automated vehicles categories.
Autonomous vehicles create new opportunities for innovative intelligent traffic systems. Variable speed limits, which is a speed management systems that can adjust the speed limit according to traffic condition or predefined speed control algorithm on different road segments, can be better implemented with the cooperation of autonomous vehicles. These compliant vehicles can automatically follow speed limits. However, non-compliant vehicles will attempt to pass the moving bottleneck created by the compliant vehicle. This project builds a multi class cell transmission model to represent the relation between traffic flow parameters. This model can calculate flows of both compliant and non-compliant vehicles. An algorithm is proposed to calculate variable speed limits for each cell of the cell transmission model. This control algorithm is designed to reduce the stop-and-go behavior of vehicles at traffic signals. Simulation is used to test the effects of VSLs on an example network. The result shows that VSL is effective at reducing the energy consumption of the whole system and reduce the likelihood of crash occurrence.