PurposeRoad traffic incidents cause delay, affect public safety and the environment. The CEDR PRIMA project aims to extend practical guidance for traffic managers in pro-active Traffic Incident Management (TIM) techniques to reduce the impacts and associated costs of incidents.MethodsThe paper describes modelling methods used in the project for assessing the effect of different management techniques on incident duration and travel delay under various scenarios, including collision, adverse weather, heavy vehicle breakdown and other obstruction, assuming various management strategies and generic impacts of novel technologies. Macroscopic simulations of 178 variations of 13 basic scenarios have been performed using a flexible and computationally efficient macroscopic queue model, results being verified by simulation using a velocity-based Cell Transmission Model (CTM-v).ResultsThe results of the two modelling methods are broadly consistent. While delays estimated by the two methods can differ by up to 20%, this is small compared to the factor of 30 range of modelled delays caused by incidents, depending on their nature and circumstances, and is not sufficient to affect general conclusions. Under the peak traffic conditions assumed, the most important factor affecting delay is whether running lanes can be kept open, but quick clearance of carriageway is not always feasible.ConclusionsComparison of two very different modelling methods confirms their consistency within the context of highly scenario-dependent results, giving confidence in the results. Future research and data needs include further validation of the models, potential application to traffic flow and conflict prediction and incident prevention, and more complete and consistent recording of incident timelines and impacts.
引用量:0发表时间:2017年
IntroductionMaintaining port safety in full conformity with IMO standards is a requisite for every port and country. To do this, understanding the challenges and human factors involved is key. To date, much research has shed valuable light on these factors and considered how to address them. One aspect that is often noted is that both maintaining port safety and researching port safety presents numerous challenges. This paper considers both these aspects in the context of a case study of port safety in Kaohsiung port, Taiwan.MethodsHistorical data and data from in-depth interviews with port operators and government officials are presented, analysed, and discussed alongside the literature.Results and conclusionIn the spirit of case study research, discussion and conclusions of the data are used to generate theory for consideration in ways to approach research in the field. Specifically, more holistic large scale research is recommended into how port safety is maintained, to explore the interdependencies of the factors involved to help improve port safety and complement and sit alongside our current understandings of it. Suggestions for how this research can be approached are made.
国际铁路运输杂志
INTERNATIONAL JOURNAL OF RAIL TRANSPORTATION
欧洲交通研究综述
EUROPEAN TRANSPORT RESEARCH REVIEW
计算机辅助土木和基础设施工程
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING