Download or read book Simulation Study of Impacts of Evacuating Traffic on En route Metropolitan Highway Network written by and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to both natural and man-made disasters, more and more emergency evacuation plans have been put forward and consistently aims to move a large disaster affected population through a multimodal transportation network towards safer areas as quickly and efficiently as possible. The objectives of this paper are 1) to verify the feasibility of applying the DYNASMART-P model to simulation of traffic characteristics in both normal and emergency conditions for the urban transportation system in the Greater Jackson metropolitan area in Mississippi and 2) to develop and evaluate emergency evacuation strategies for a large scale evacuation of people under emergency conditions in the Greater Jackson area. In this paper, traffic network including Hinds, Madison and Rankin was built through the mesoscopic traffic-network planning and simulation model DYNASMART-P based on the dynamic traffic assignment methodology, and applied the model to a highway network on the route of the evacuation. The background OD demand as input for the simulation program was calibrated using observed traffic volume data collected in several critical routes of evacuation. An evacuation scenario was designed to study the impacts of the evacuating traffic from southeastern Louisiana to the Greater Jackson Metropolitan Area of Mississippi due to an assumed approaching hurricane disaster. Critically congested freeway segments under two evacuation intensity levels were identified based on the criterion of the average queue length percentage and level of service. The causes for the congestion of roads were analyzed and explained.
Download or read book Simulation Study of Impact of Evacuation Traffic on En route Metropolitan Highway Network written by and published by . This book was released on 2009 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use and Comparison of Traffic Simulation Models in the Analysis of Emergency Evacuation Conditions written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The evacuation of vulnerable coastal areas in the event of an emergency such as an impending hurricane has become a significant safety issue due to the rapid growth of both permanent and tourist populations in these areas. Highway capacity has often not been upgraded in line with this demand growth. In the case of Hurricane Floyd in 1999, evacuations of areas of North and South Carolina resulted in several highly congested primary highways and, as a result, several states created Lane Reversal Plans for interstates and/or divided highways along evacuation routes. However, these plans were created with little data to rely on as to their efficiency. A major research study was funded by the North Carolina Department of Transportation (NCDOT) to use simulation modeling to investigate the effects of the Interstate 40 Lane Reversal Plan on the evacuation of Wilmington and New Hanover County, North Carolina. In addition to the analysis of the effects of lane reversal, a side-by-side comparison of the CORSIM and VISSIM simulation models was performed on the highway network based on demand estimates provided by a demand study performed for the United States Army Corps of Engineers and the Federal Emergency Management Agency (FEMA). Analysis using CORSIM and VISSIM showed lane reversal to provide considerable capacity increases to traffic attempting to exit New Hanover County via Interstate 40, which had significantly increased throughput and decreased queues within New Hanover County in the event of large-scale evacuations.
Download or read book Large Scale Evacuation written by Michael K. Lindell and published by CRC Press. This book was released on 2018-12-07 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large-Scale Evacuation introduces the reader to the steps involved in evacuation modelling for towns and cities, from understanding the hazards that can require large-scale evacuations, through understanding how local officials decide to issue evacuation advisories and households decide whether to comply, to transportation simulation and traffic management strategies. The author team has been recognized internationally for their research and consulting experience in the field of evacuations. Collectively, they have 125 years of experience in evacuation, including more than 140 projects for federal and state agencies. The text explains how to model evacuations that use the road transportation network by combining perspectives from social scientists and transportation engineers, fields that have commonly approached evacuation modelling from distinctly different perspectives. In doing so, it offers a step-by-step guide through the key questions needed to model an evacuation and its impacts to the evacuation route system as well as evacuation management strategies for influencing demand and expanding capacity. The authors also demonstrate how to simulate the resulting traffic and evacuation management strategies that can be used to facilitate evacuee movement and reduce unnecessary demand. Case studies, which identify key points to analyze in an evacuation plan, discuss evacuation termination and re-entry, and highlight challenges that someone developing an evacuation plan or model should expect, are also included. This textbook will be of interest to researchers, practitioners, and advanced students.
Download or read book Regional Traffic Simulation for Emergency Preparedness written by and published by . This book was released on 2004 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Data Resolution and Human Behavior on Large Scale Evacuation Simulations written by Wei Lu (Transportation engineer) and published by . This book was released on 2013 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic Analysis Zones (TAZ) based macroscopic simulation studies are mostly applied in evacuation planning and operation areas. The large size in TAZ and aggregated information of macroscopic simulation underestimate the real evacuation performance. To take advantage of the high resolution demographic data LandScan USA (the zone size is much smaller than TAZ) and agent-based microscopic traffic simulation models, many new problems appeared and novel solutions are needed. A series of studies are conducted using LandScan USA Population Cells (LPC) data for evacuation assignments with different network configurations, travel demand models, and travelers' compliance behavior. First, a new Multiple-Source-Nearest-Destination Shortest Path (MSNDSP) problem is defined for generating Origin-Destination (OD) matrix in evacuation assignments when using LandScan dataset. A new Super Node based Trip Generator (SNTG) algorithm is developed to significantly improve the computational performance in generating OD pairs. Second, a new agent-based traffic assignment framework using LandScan and TRANSIMS modules is proposed for evacuation planning and operation study. Impact analysis on traffic analysis area resolutions (TAZ vs. LPC), evacuation start times (daytime vs. nighttime), and departure time choice models (normal S-shape model vs. location based model) are studied. Third, based on the proposed framework, multi-scale network configurations (two levels of road networks and two scales of zone sizes) and three routing schemes (shortest network distance, highway biased, and shortest straight-line distance routes) are implemented for the evacuation performance comparison studies. Fourth, to study the impact of human behavior under evacuation operations, travelers' compliance behavior with compliance levels from total complied to total non-complied are analyzed. Finally, an experimental study of using vehicular communication techniques in a car sharing system is conducted, which can be used to provide real-time road information for evacuees to choose their own best evacuation routes.
Download or read book Evaluating the Impacts of Connected Vehicle Technology on Evacuation Efficiency written by Karzan Bahaaldin and published by . This book was released on 2015 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: No-notice evacuations of metropolitan areas can place significant demands on transportation infrastructure. In preparation, emergency managers and transportation engineers study potential demands and many create evacuation traffic management plans. The findings from a St. Louis Metro East evacuation study revealed some problematic areas of the transportation network. At these locations the traffic backed up during a simulated evacuation, caused a significant amount of delay, and increased the evacuation clearance time. An emerging paradigm called Connected Vehicle (CV) technology can provide real-time communication between vehicles in a traffic stream. The objectives of this research were to evaluate the impacts of CVs on evacuation from a downtown metropolitan area. The microsimulation software VISSIM was used to model the roadway network and the evacuation traffic. The model was built, calibrated and validated for studying the performance of traffic during the evacuation. This model helped researchers to find the time required to evacuate people in this area for different disaster scenarios. Because it is unlikely that vehicles equipped with CV technologies will become commonplace soon, the researcher tested different levels of deployment, also known as penetration rate. This study included penetration rates from 0 to 30 percent CVs; evaluating the average speed, average and total delays. The findings suggest significant reductions in total delays when CVs reached a penetration rate of 30 percent or greater. Results showed that the presence of CVs at a penetration rate of 30 percent could reduce the overall traffic delay by 60 percent over the evacuation period. A sensitivity analysis was conducted and the finding showed that a 10 percent increase in the penetration rate will significantly improve traffic flow. The findings of this study suggest that the communication capabilities of CVs can reduce delays and improve the traffic flow rate during a no-notice evacuation. Additionally, the benefits could be greater for evacuations with higher volumes, evacuations that last longer, and evacuations with higher proportions of CVs in the vehicle stream.
Download or read book Critical Infrastructure Emergency Evacuation and Logistics of Disaster Recovery 2014 written by and published by . This book was released on 2014 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's Transportation Research Record (TRR): Journal of the Transportation Research Board (TRR), No. 2459: Critical infrastructure, emergency Evacuation, and logistics of disaster recovery 2014 summarizes ways to plan post-disaster operations in a highway network; a model for investigating traffic incident impacts on evacuation times in large-scale emergencies; an approach for assessing climate change vulnerabilities in transportation infrastructure; and a cost assessment of highway bridge networks subjected to extreme seismic events. This TRR also explores mobility benefits of intermediate crossovers on contraflow facilities during hurricane evacuation; mathematical modeling of command-and-control strategies in crowd movement; a network flow solution method for optimal evacuation traffic routing and signal control with nonuniform threats; a simulation study of evacuation routes and traffic management strategies in short-notice emergency evacuation; and accessibility of low-income populations to safe zones during localized evacuations. In addition, this TRR examines an efficient negative cycle-canceling algorithm for finding the optimal traffic routing for network evacuation with nonuniform threats; modeling and assessment of crossing elimination for no-notice evacuations; effects of phased evacuations on highway networks in megaregions; use of social media data to explore crisis informatics; use of mobile LiDAR data to assess hurricane damage and visualize community vulnerability; and experiences and lessons learned with urban ferries and catastrophic floods." -- Publisher's description
Download or read book Transportation Systems and Engineering Concepts Methodologies Tools and Applications written by Management Association, Information Resources and published by IGI Global. This book was released on 2015-06-30 with total page 1735 pages. Available in PDF, EPUB and Kindle. Book excerpt: From driverless cars to vehicular networks, recent technological advances are being employed to increase road safety and improve driver satisfaction. As with any newly developed technology, researchers must take care to address all concerns, limitations, and dangers before widespread public adoption. Transportation Systems and Engineering: Concepts, Methodologies, Tools, and Applications addresses current trends in transportation technologies, such as smart cars, green technologies, and infrastructure development. This multivolume book is a critical reference source for engineers, computer scientists, transportation authorities, students, and practitioners in the field of transportation systems management.
Download or read book The Effect of Shadow Evacuation in Megaregion Disasters written by Paul Brian Wolshon and published by . This book was released on 2018 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transportation systems serve important roles during emergencies, in particular for evacuations. However, efficient travel during these life-and-death scenarios can be adversely impacted by external conditions, such as unnecessary and unneeded travel. This research sought to enhance the understanding of the effects of these conditions by analyzing shadow evacuations, and their impact on regional traffic operations in megaregions, more broadly. The research was based on simulations of a range of hurricane evacuation threat scenarios in the Gulf of Mexico building upon prior study using TRANSIMS. These assessments are also targeted at what many assume could be worst-case evacuation conditions and pushing the limits of current simulation modeling capability. Among the broader findings of this work was that shadow evacuation participation rates did not significantly impact the evacuation clearance times within mandatory evacuation areas of the megaregion as long as demand could be temporarily spread out. This finding does not, however, suggest that the shadow evacuations have no impact on evacuation processes. High rates of shadow evacuees can cause significant congestion if they are not able to exit critical routes before mandatory evacuees reach areas further away from the coast.
Download or read book Emergency Evacuation Study for the Greater Jackson Area written by Chao Li and published by . This book was released on 2011 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: In response to both natural and man-made disasters, more and more emergency evacuations plans have been put forward and consistently aims to move a large disaster affected population through a highway network towards safer areas as quickly and efficiently as possible. The objectives of this study are 1) to verify the feasibility of applying the DYNASMART-P model to simulations of traffic characteristics in both normal and emergency conditions for the urban transportation system in the Greater Jackson metropolitan area in Mississippi and 2) to evaluate the effects of possible traffic management strategies on a large scale evacuation of people under emergency conditions on highway network in the Greater Jackson area.
Download or read book Computer Simulation based Framework for Transportation Evacuation in a Major Trip Generator written by Fengxiang Qiao and published by . This book was released on 2009 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since emergencies including both natural disasters and man-made incidents, are happening more and more frequently, evacuation, especially transportation evacuation, is becoming a hot research focus in recent years. Currently, transportation evacuation study focuses on evacuating people and property from large areas and does not address the problem of transportation evacuation in a small and dense area. This research is intended to identify the study framework of developing transportation evacuation plans in small and dense areas. Texas Medical Center (TMC), Houston, Texas, is selected as case study in this thesis. Incidents are assumed based on potential threats. Traffic information is collected through filed data collections in the TMC area, and evacuation scenarios with incidents and management improvements are coded and simulated in VISSIM, a microscopic traffic simulation model. Genetic Algorithm is one of the calibration methods for searching multiple parameters at the same time and is used in this thesis to calibrate parameters of driving behaviors in VISSIM by using field collected and simulation data. Based on the simulation results, potential improvements and measurement of effectiveness (MOE) of operations such as Reversed Lane (RL) and In-bound Shuttle (IS) are analyzed and evaluated. Simulation results show that the evacuation would be much more efficient if appropriate operational strategies are implemented. Proper management improvements such as Reversed Lane and In-bound Shuttle could greatly maximize the number of persons/vehicles evacuated in the area. The selected operational plan can efficiently evacuate all persons in the Texas Medical Center in suitable simulation scenario under a given incident assumption. The framework of developing transportation evacuation plan is tested and proven to be effective in the Texas Medical Center. The microscopic simulation based study process is targeted on small and dense areas and it can be used in any other similar areas. It is recommended that further work be conducted to form a comprehensive evacuation plan.
Download or read book Modeling the Traffic Impacts During Evacuation of a Suburban University Campus written by Karna Ghale and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Economic Analysis Primer written by and published by . This book was released on 2003 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This primer provides a foundation for understanding the role of economic analysis in highway decision making. It is oriented toward state and local officials who have responsibility for assuring that limited resources get targeted to their best uses and who must publicly account for their decisions. Economic analysis is presented as an integral component of a comprehensive infrastructure management methodology that takes a long-term view of infrastructure performance and cost. The primer encompasses a full range of economic issues, including economic fundamentals, life-cycle cost analysis, benefit-cost analysis, forecasting traffic for benefit calculations, risk analysis and economic impact analysis.
Download or read book Development of Operational Strategies for Travel Time Estimation and Emergency Evacuation on a Freeway Network written by Eil Kwon and published by . This book was released on 2004 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research studied the feasibility of applying a dynamic traffic assignment model, Dynasmart-P, for evaluating the effectiveness of alternative strategies for evacuating the traffic in downtown Minneapolis, Minnesota, under a hypothetical emergency situation that included the evacuation of the sell-out crowd in the Metrodome. For this study, the southwest portion of the Twin Cities metro area was selected as the study network and a set of different network configurations were evaluated in terms of their effectiveness in coping with a given emergency situation. The simulation results indicate that managing traffic conditions at the outbound freeway links in the given network during the evacuation period and the access capacity from the downtown area to those outbound freeway links are the critical factors affecting the effectiveness of evacuation operations. For example, the evacuation time under the contra-flow operations with the freeways surrounding the downtown area was substantially reduced when the capacities of the key entrance ramps were also increased. Further, an enhanced snap-shot-speed based, on-line travel time estimation strategy was developed and tested at the selected freeway corridors in the Twin Cities' metro freeway network. The off-line testing results of the proposed method showed acceptable performance during the traffic transition periods for the freeway sections up to 12-mile length.
Download or read book Intelligent Transportation and Evacuation Planning written by Arab Naser and published by Springer. This book was released on 2012-05-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intelligent Transportation and Evacuation Planning: A Modeling-Based Approach provides a new paradigm for evacuation planning strategies and techniques. Recently, evacuation planning and modeling have increasingly attracted interest among researchers as well as government officials. This interest stems from the recent catastrophic hurricanes and weather-related events that occurred in the southeastern United States (Hurricane Katrina and Rita). The evacuation methods that were in place before and during the hurricanes did not work well and resulted in thousands of deaths. This book offers insights into the methods and techniques that allow for implementing mathematical-based, simulation-based, and integrated optimization and simulation-based engineering approaches for evacuation planning.
Download or read book Simulation Model for Rural Highway Network Evacuation Under Natural Disasters written by Daivamani Sivasailam and published by . This book was released on 1984 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
