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Author :
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (948 download)
Download or read book Surrogate safety measures from traffic simulation models, final report written by and published by . This book was released on 2003 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Douglas Gettman
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (74 download)
Download or read book Surrogate Safety Measures from Traffic Simulation Models written by Douglas Gettman and published by . This book was released on 2003 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This project investigates the potential for deriving surrogate measures of safety from existing microscopic traffic simulation models for intersections. The process of computing the measures in the simulation, extracting the required data, and summarizing the results is denoted as the Surrogate Safety Assessment Methodology. These surrogate measures could then be used to support traffic engineering alternatives evaluation with respect to safety for both signalized and unsignalized intersections. The report describes the five main activities of this project: (1) review of previous work in modeling of safety at traffic facilities (focusing on intersection safety modeling) using surrogate measures, (2) survey of the capabilities of existing traffic simulation models to support derivation of surrogate measures of safety, (3) identification of use cases and functional requirements for a surrogate safety assessment tool that interacts with traffic simulation model outputs, (4) specification of algorithms for calculating surrogate measures of safety appropriate for intersections, and (5) suggestions for validation activities to support the analysis potential for surrogate measures and compare surrogate measures from simulation models with field data and previous safety studies"--Technical report documentation page.
Author :
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (316 download)
Download or read book Surrogate Safety Assessment Model and Validation written by and published by . This book was released on 2008 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Safety of traffic facilities is most often measured by counting the number (and severity) of crashes that occur. It is not possible to apply such a measurement technique to traffic facility designs that have not yet been built or deployed in the real world. This project has resulted in the development of a software tool for deriving surrogate safety measures for traffic facilities from data output by traffic simulation models. This software is referred to as SSAM, an acronym for the Surrogate Safety Assessment Model. The surrogate measures developed in this project are based on the identification, classification, and evaluation of traffic conflicts that occur in the simulation model. By comparing one simulated design case with another, this software allows an analyst to make statistical judgments about the relative safety of the two designs. The method is based on processing detailed trajectories of all vehicles in the simulation environment and identifying conflicts that occur between any two vehicles. An open-standard vehicle trajectory data format was designed, and support for this format has been added as an output option by four simulation model vendors/developers PTV (VISSIM), TSS (AIMSUN), Quadstone (Paramics), and Rioux Engineering (TEXAS). Eleven 'theoretical' validation tests were performed to compare the surrogate safety assessment results of pairs of simulated design alternatives. In some cases, these comparative tests showed clear agreement with traditional results from crash prediction models; and, in other cases, the results from SSAM utilizing the traffic simulation models were counterindicative. Typically, one design would exhibit a statistically significant lower number of conflicts, but the severity of conflicts that did occur would be higher. Nevertheless, SSAM does provide metrics for use by analysts in comparing traffic facility designs that do not have established crash statistics. More research work is necessary to refine the metrics for broader consumption by a general audience. A field validation exercise was completed to compare the output from SSAM with real-world crash records. Eighty-three intersections from British Columbia, Canada were modeled in VISSM and simulated under AM-peak traffic conditions. The processed conflict results were then compared with the crash records in a number of different statistical validation tests. In general, the correlation results between the outputs from the simulation models and the crash records were significant, with the regression model predicting crashes from conflict data exhibiting a correlation (R-squared) value of = 0.41. However, the simulation modeling effort did present a number of issues. Sensitivity analysis was performed to identify differences between the SSAM-related outputs of each simulation model vendors system on the same traffic facility designs. These comparative analyses provide some guidance to the relative use of surrogate measures data from each simulation system. For more information regarding the SSAM tool and user manual (FHWA-HRT-08-050) see companion report, PB2008-111196.
Author :
Publisher :
ISBN 13 :
Total Pages : 300 pages
Book Rating : 4.:/5 (243 download)
Download or read book Surrogate Safety Measures from Traffic Simulation Models written by and published by . This book was released on 2008 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hong Yang
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (785 download)
Download or read book Simulation-based Evaluation of Traffic Safety Performance Using Surrogate Safety Measures written by Hong Yang and published by . This book was released on 2012 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic safety evaluation is one of the most important processes in the analysis of transportation systems performance. The use of traditional crash-data-oriented methodologies to analyze traffic safety problems has been frequently questioned due to shortcomings such as unavailability and low quality of historical crash data. The advancement of traffic conflict techniques and micro-simulation tools motivated this dissertation to develop a simulation-based approach of combining micro-simulation models and traffic conflict technique to investigate the safety issues in traffic systems. The proposed simulation-based approach consists of two major components: the development of surrogate safety measures; and the integration of the developed surrogate safety measures with micro-simulation models. In this dissertation, a new surrogate safety measure is derived and applied in micro-simulation models to capture the conflict risk of the interactions among vehicles. The conceptual and computational logics of the proposed surrogate safety indicator are described in detail. A calibration procedure that focuses on safety evaluation using the simulation model with the new surrogate measure has been proposed. The proposed calibration approach has been developed based on the stochastic gradient approximation algorithms to find optimal parameters of the stochastic traffic simulation models. The calibration methodology has been implemented on a selected traffic simulation platform to test its performance. Simulated operational measurements and traffic conflict risk in terms of the surrogate safety measure are quantified and compared with observations derived from high resolution vehicle trajectory data. The calibrated traffic model has also been validated by using independent vehicle trajectory data saved as a hold-out sample. The results show that the fine-tuning of parameters using the proposed calibration approach can significantly improve the performance of the simulation model to describe actual traffic conflict risk as well as operational performance. The applicability of the proposed new surrogate measure and the simulation-based safety evaluation approach using this surrogate measure has been successfully demonstrated through several cases studies. The overall findings can inform road safety investigators as to how operations-oriented simulation models in conjunction with the surrogate safety measure can complement traffic safety evaluation in cases to which traditional approaches are not applicable.
Author : Dominique Lord
Publisher : Emerald Group Publishing
ISBN 13 : 1787148920
Total Pages : 511 pages
Book Rating : 4.7/5 (871 download)
Download or read book Safe Mobility written by Dominique Lord and published by Emerald Group Publishing. This book was released on 2018-04-18 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book increases the level of knowledge on road safety contexts, issues and challenges; shares what can currently be done to address the variety of issues; and points to what needs to be done to make further gains in road safety.
Author : Andrew Tarko
Publisher : Elsevier
ISBN 13 : 0128105046
Total Pages : 252 pages
Book Rating : 4.1/5 (281 download)
Download or read book Measuring Road Safety with Surrogate Events written by Andrew Tarko and published by Elsevier. This book was released on 2019-11-15 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring Road Safety Using Surrogate Events provides researchers and practitioners with the tools they need to quickly and effectively measure traffic safety. Traditional crash-based safety analyses are being undermined by today's growing use of intelligent vehicular and road safety technologies. Crash surrogates--or near misses--can be more effectively used to measure the future risk of crashes. Measuring Road Safety Using Surrogate Events advances the idea of using these near-crash techniques to deliver quicker and more adequate measurements of safety. The book explores the relationships between traffic conflicts and crashes using an extrapolation of observed events rather than post-crash data, which is significantly slower to obtain. It delivers sound estimation methods based on rigorous scientific principles, offering compelling new tools to better equip researchers to understand road safety and its factors. Consolidates the latest thinking from disparate places into one resource Establishes a consistent use of key terms, definitions, and concepts to help codify this emerging field Numerous application-oriented case studies throughout Learning aids include chapter objectives, glossary, and links to data used in examples
Author : Lelitha Devi
Publisher : Springer Nature
ISBN 13 : 9811942048
Total Pages : 442 pages
Book Rating : 4.8/5 (119 download)
Download or read book Proceedings of the Sixth International Conference of Transportation Research Group of India written by Lelitha Devi and published by Springer Nature. This book was released on 2022-09-28 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises the proceedings of the Sixth International Conference of Transportation Research Group of India (CTRG2021) 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.
Author : Gianluca Dell'Acqua
Publisher : CRC Press
ISBN 13 : 1315281880
Total Pages : 1134 pages
Book Rating : 4.3/5 (152 download)
Download or read book Transport Infrastructure and Systems written by Gianluca Dell'Acqua and published by CRC Press. This book was released on 2017-03-16 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport Infrastructure Asset management in transport infrastructure, financial viability of transport engineering projects/ Life cycle Cost Analysis, Life-Cycle Assessment and Sustainability Assessment of transport infrastructure/ Infrastructures financing and pricing with equity appraisal, operation optimization and energy management/ Low-Volume roads: planning, maintenance, operations, environmental and social issues/ Public-Private Partnership (PPP) experience in transport infrastructure in different countries and economic conditions/ Airport Pavement Management Systems, runway design and maintenance/ Port maintenance and development issues, technology relating to cargo handling, landside access, cruise operations/ Infrastructure Building Information Modelling (I-BIM) / Pavement design and innovative bituminous materials/ Recycling and re-use in road pavements, environmentally sustainable technologies/ Stone pavements, ancient roads and historic railways/ Cementitious stabilization of materials used in the rehabilitation of transportation infrastructure. Transport Systems Sustainable transport and the environment protection including green vehicles/ Urban transport, land use development, spatial and transport planning/ Bicycling, bike, bike-sharing systems, cycling mobility/ Human factor in transport systems/ Intelligent Mobility: emerging technologies to enable the smarter movement of people and goods/Airport landside: access roads, parking facilities, terminal facilities, aircraft apron and the azdjacent taxiway/ Transportation policy, planning and design, modelling and decision making/ Transport economics, finance and pricing issues, optimization problems, equity appraisal/ Road safety impact assessments, road safety audits, the management of road network safety and safety inspections/ Tunnels and underground structures: preventing incidents-accidents mitigating their effects for both people and goods/ Traffic flow characteristics, traffic control devices, work zone traffic control, highway capacity and quality of service/ Track-vehicle interactions in railway systems, capacity analysis of railway networks/ Risk assessment and safety in air and railway transport, reliability aspects/ Maritime transport and inland waterways transport research/ Intermodal freight transport: terminals and logistics.
Author : Imad L. Al-Qadi
Publisher : CRC Press
ISBN 13 : 0203881206
Total Pages : 924 pages
Book Rating : 4.2/5 (38 download)
Download or read book Efficient Transportation and Pavement Systems: Characterization, Mechanisms, Simulation, and Modeling written by Imad L. Al-Qadi and published by CRC Press. This book was released on 2008-11-01 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internationally, significant attention is given to transport sustainability including planning, design, construction, evaluation, safety and durability of the road system. The 4th International Gulf Conference on Roads: Efficient Transportation and Pavement Systems - Characterization, Mechanisms, Simulation, and Modeling, hosted by the University o
Author : Gereon Meyer
Publisher : Springer Nature
ISBN 13 : 3031347579
Total Pages : 186 pages
Book Rating : 4.0/5 (313 download)
Download or read book Road Vehicle Automation 10 written by Gereon Meyer and published by Springer Nature. This book was released on 2023-06-13 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the tenth volume of a sub-series on Road Vehicle Automation, published as part of the Lecture Notes in Mobility. It gathers contributions to the Automated Road Transportation Symposium (ARTS 2022), held on July 18-21, 2022, in Garden Grove, USA, CA. Written by researchers, engineers and analysts from around the globe, this book offers a multidisciplinary perspectives on the opportunities and challenges associated with automating road transportation. It highlights innovative strategies, including public policies, infrastructure planning and automated technologies, which are expected to foster sustainable and automated mobility in the near future, thus addressing industry, government and research communities alike.
Author : Fadzli Mohamed Nazri
Publisher : Springer Nature
ISBN 13 : 3030328163
Total Pages : 1635 pages
Book Rating : 4.0/5 (33 download)
Download or read book Proceedings of AICCE'19 written by Fadzli Mohamed Nazri and published by Springer Nature. This book was released on 2019-11-28 with total page 1635 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the latest research, innovations, and applications in the field of civil engineering, as presented by leading national and international academics, researchers, engineers, and postgraduate students at the AWAM International Conference on Civil Engineering 2019 (AICCE’19), held in Penang, Malaysia on August 21-22, 2019. The book covers highly diverse topics in the main fields of civil engineering, including structural and earthquake engineering, environmental engineering, geotechnical engineering, highway and transportation engineering, water resources engineering, and geomatic and construction management. In line with the conference theme, “Transforming the Nation for a Sustainable Tomorrow”, which relates to the United Nations’ 17 Global Goals for Sustainable Development, it highlights important elements in the planning and development stages to establish design standards beneficial to the environment and its surroundings. The contributions introduce numerous exciting ideas that spur novel research directions and foster multidisciplinary collaborations between various specialists in the field of civil engineering.
Author : Jaume Barceló
Publisher : Springer Science & Business Media
ISBN 13 : 1441961429
Total Pages : 450 pages
Book Rating : 4.4/5 (419 download)
Download or read book Fundamentals of Traffic Simulation written by Jaume Barceló and published by Springer Science & Business Media. This book was released on 2011-01-06 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing power of computer technologies, the evolution of software en- neering and the advent of the intelligent transport systems has prompted traf c simulation to become one of the most used approaches for traf c analysis in s- port of the design and evaluation of traf c systems. The ability of traf c simulation to emulate the time variability of traf c phenomena makes it a unique tool for capturing the complexity of traf c systems. In recent years, traf c simulation – and namely microscopic traf c simulation – has moved from the academic to the professional world. A wide variety of traf- c simulation software is currently available on the market and it is utilized by thousands of users, consultants, researchers and public agencies. Microscopic traf c simulation based on the emulation of traf c ows from the dynamics of individual vehicles is becoming one the most attractive approaches. However, traf c simulation still lacks a uni ed treatment. Dozens of papers on theory and applications are published in scienti c journals every year. A search of simulation-related papers and workshops through the proceedings of the last annual TRB meetings would support this assertion, as would a review of the minutes from speci cally dedicated meetings such as the International Symposiums on Traf c Simulation (Yokohama, 2002; Lausanne, 2006; Brisbane, 2008) or the International Workshops on Traf c Modeling and Simulation (Tucson, 2001; Barcelona, 2003; Sedona, 2005; Graz 2008). Yet, the only comprehensive treatment of the subject to be found so far is in the user’s manuals of various software products.
Author : Andrew Tarko
Publisher : Elsevier
ISBN 13 : 0128105054
Total Pages : 254 pages
Book Rating : 4.1/5 (281 download)
Download or read book Measuring Road Safety with Surrogate Events written by Andrew Tarko and published by Elsevier. This book was released on 2019-11-07 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measuring Road Safety Using Surrogate Events provides researchers and practitioners with the tools they need to quickly and effectively measure traffic safety. As traditional crash-based safety analyses are being undermined by today’s growing use of intelligent vehicular and road safety technologies, crash surrogates--or near misses--can be more effectively used to measure the future risk of crashes. This book advances the idea of using these near-crash techniques to deliver quicker and more adequate measurements of safety. It explores the relationships between traffic conflicts and crashes using an extrapolation of observed events rather than post-crash data, which is significantly slower to obtain. Readers will find sound estimation methods based on rigorous scientific principles, offering compelling new tools to better equip researchers to understand road safety and its factors. Consolidates the latest updates/ideas from disparate places into a single resource Establishes a consistent use of key terms, definitions and concepts to help codify this emerging field Contains numerous application-oriented case studies throughout Includes learning aids, such as chapter objectives, a glossary, and links to data used in examples
Author :
Publisher : AASHTO
ISBN 13 : 1560514779
Total Pages : 886 pages
Book Rating : 4.5/5 (65 download)
Download or read book Highway Safety Manual written by and published by AASHTO. This book was released on 2010 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Highway Safety Manual (HSM) is a resource that provides safety knowledge and tools in a useful form to facilitate improved decision making based on safety performance. The focus of the HSM is to provide quantitative information for decision making. The HSM assembles currently available information and methodologies on measuring, estimating and evaluating roadways in terms of crash frequency (number of crashes per year) and crash severity (level of injuries due to crashes). The HSM presents tools and methodologies for consideration of 'safety' across the range of highway activities: planning, programming, project development, construction, operations, and maintenance. The purpose of this is to convey present knowledge regarding highway safety information for use by a broad array of transportation professionals"--p. xxiii, vol. 1.
Author : Iisakki Kosonen
Publisher :
ISBN 13 : 9789512247783
Total Pages : 249 pages
Book Rating : 4.2/5 (477 download)
Download or read book HUTSIM: Urban Traffic Simulation and Control Model: Principles and Applications written by Iisakki Kosonen and published by . This book was released on 1999 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tiivistelmä. - Sammandrag.
Author : Wuhong Wang
Publisher : Springer Nature
ISBN 13 : 9811506442
Total Pages : 1505 pages
Book Rating : 4.8/5 (115 download)
Download or read book Green, Smart and Connected Transportation Systems written by Wuhong Wang and published by Springer Nature. This book was released on 2020-03-23 with total page 1505 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings gather selected papers from the 9th International Conference on Green Intelligent Transportation Systems and Safety, held in Guilin, China on July 1-3, 2018. They feature cutting-edge studies on Green Intelligent Mobility Systems, the guiding motto being to achieve “green, intelligent, and safe transportation systems.” The contributions presented here can help promote the development of green mobility and intelligent transportation technologies to improve interconnectivity, resource sharing, flexibility and efficiency. Given its scope, the book will benefit researchers and engineers in the fields of Transportation Technology and Traffic Engineering, Automotive and Mechanical Engineering, Industrial and System Engineering, and Electrical Engineering alike.
