Download or read book Evaluation of the Impacts of Emergency Vehicle Signal Preemption written by Gang Xie and published by . This book was released on 2007 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Emergency Vehicle Signal Preemption on the Route 7 Virginia Corridor written by Darcy Bullock and published by . This book was released on 1999 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traffic Signal Preemption for Emergency Vehicles written by and published by . This book was released on 2006 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strategy Analysis and Evaluation for Emergency Vehicle Preemption and Transit Signal Priority with Connected Vehicles Using Software in the Loop Simulation written by Angshuman Guin and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Assessment Methodology for Emergency Vehicle Traffic Signal Priority Systems written by Gene M. McHale and published by . This book was released on 2002 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research investigates the current state of available methodologies used in assessing the costs and benefits of emergency vehicle traffic signal priority systems. The ITS Deployment Analysis System (IDAS) software is identified as a recently developed transportation planning tool with cost and benefit assessment capabilities for emergency vehicle traffic signal priority systems. The IDAS emergency vehicle traffic signal priority methodology is reviewed and recommendations are made to incorporate the estimation of non-emergency vehicle travel time impacts into the current methodology.

Download or read book Traffic Signal Preemption for Emergency Vehicles written by United States. Department of Transportation. Intelligent Transportation Systems and published by . This book was released on 2006 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Pre emption and Transition Strategies for Northern Virginia Smart Traffic Signal Systems NVSTSS written by Byungkyu Park and published by . This book was released on 2008 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern traffic signal control systems provide emergency vehicle preemption (EVP) capabilities by utilizing advanced sensors and communication technologies. EVP strategies are widely implemented by urban transportation management agencies. One of the challenges of implementing EVP under coordinated-actuated signal systems is selecting the best coordination recovery strategy at the end of preemption such that disruptions to the normal traffic signal operations are minimized. Similarly, time-of-day (TOD) traffic operations also produce such disruptions while transitioning between TOD modes and require returning to coordination. This report presents the evaluation results of various EVP recovery and TOD transition strategies in an urban corridor including four coordinated-actuated signals along Lee Jackson Memorial Highway in Chantilly, Virginia. Since field testing of various preemption and TOD transition strategies is impractical, the study was performed using hardware-in-the-loop simulation, which consisted of a well-calibrated VISSIM microscopic simulation model, four traffic controllers, and four controller interface devices. The study results showed that advanced controllers (e.g., 2070 and ASC/3) have advantages over the 170 controller for the EVP recovery strategies, while the 170 controller's TOD transition strategies outperformed those of the newer controllers.

Download or read book Routledge Handbook of Transportation written by Dusan Teodorovic and published by Routledge. This book was released on 2015-08-20 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Routledge Handbook of Transportation offers a current and comprehensive survey of transportation planning and engineering research. It provides a step-by-step introduction to research related to traffic engineering and control, transportation planning, and performance measurement and evaluation of transportation alternatives. The Handbook of Transportation demonstrates models and methods for predicting travel and freight demand, planning future transportation networks, and developing traffic control systems. Readers will learn how to use various engineering concepts and approaches to make future transportation safer, more efficient, and more sustainable. Edited by Dušan Teodorović and featuring 29 chapters from more than 50 leading global experts, with more than 200 illustrations, the Routledge Handbook of Transportation is designed as an invaluable resource for professionals and students in transportation planning and engineering.

Download or read book A Simulation based Approach to Evaluate Safety Impacts of Increased Traffic Signal Density written by Kenneth P. Drummond and published by . This book was released on 2002 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most controversial access management techniques practitioners face is also one of the most common: restricting signal density. Increased signal density can improve access for minor approaches to a corridor; however, it can also increase delays and rear-end crashes for vehicles on the mainline (major) approach. An ability to evaluate the impacts of increased signal spacing is thus critical for decision makers. Because crash data are not always easy to obtain, a logical question arises: Can simulation models be used to evaluate the safety impacts of increased traffic signal density? This report describes a method for using simulation models to evaluate the safety impacts of increased traffic signal density in suburban corridors. Using 10 years of data from two major arterials in Virginia, actual crash rates were compared with operational performance measures simulated by the Synchro/SimTraffic model. As expected, crash rates were positively correlated with stops per vehicle and delay per vehicle and negatively correlated with mainline speed. Three findings were significant. First, the correlation between crash rates and select mainline performance measures (delay, speed, and stops) was relatively strong despite the inherent variability in crash rates: R2, a measure of explained variance in crash rates, yielded values from 0.54 to 0.89. Second, three distinct regimes relate stops per vehicle to signal density: the installation of the first few signals causes a drastic increase in stops, the addition of the next set of signals causes a moderate increase in stops, and the addition of a third set of signals does not significantly affect the number of stops per vehicle. Third, multiple regime models also relate delay per vehicle to signal density. This study recommends two practical applications. To the extent these mainline performance measures correlate with crashes, simulation modeling may be used to estimate safety impacts of increased signals, which is appealing because simulation packages are becoming easier to apply. Further, three regime models can suggest when, in the timeline of corridor development, the addition of a traffic signal is likely to degrade corridor performance significantly versus when it will have little effect, thereby allowing decision makers to expend political capital when it is most beneficial (e.g., the occasions when there is significant degradation of corridor performance). Most important, the approach herein suggests a long-range corridor-planning tool for evaluating the impacts of different access densities.

Download or read book Traffic Signal Systems written by and published by . This book was released on 2016 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traffic Signal Retiming Practices in the United States written by Robert L. Gordon and published by Transportation Research Board. This book was released on 2010 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 409: Traffic Signal Retiming Practices in the United States explores practices that operating agencies currently use to revise traffic signal timing. The report examines the processes used to develop, install, verify, fine-tune, and evaluate the plans--

Download or read book Traffic signal preemption for emergency vehicles written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Traffic Signal Control Algorithm for Emergency Vehicles written by Md Asaduzzaman and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Signal preemption disrupts normal traffic signal to allow emergency vehicles to pass through the intersection more safely and quickly. In medical emergency situations, EVP (Emergency Vehicle Preemption) offers a faster response to the sufferer which improves the chance of survival. Despite this lifesaving advantage, conventional preemption has some problems which need more attention. Two important issues are increased delay of overall traffic due to preemption and absence of prioritization of conflicting preemption requests. This thesis presents a traffic signal control algorithm that addresses the above. We have used TSP (Transit Signal Priority) techniques to improve the EVP system. TSP is a proven strategy to provide a better quality public transit operation in urban areas. Our proposed algorithm adjusts signal phases using TSP techniques to serve an emergency vehicle. We consider both single and multiple simultaneous emergency vehicle requests. TSP techniques help us to alleviate the impact on general traffic. For multiple emergency vehicle requests, a branch and bound algorithm is developed that prioritizes among conflicting requests. Experiments have been conducted using the VISSIM microscopic traffic simulator. Results show that the proposed traffic control algorithm reduces overall traffic delay by up to 8% compared to conventional EVP system.

Download or read book Transportation Research Record written by and published by . This book was released on 2000 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reducing Risk Through the Use of Traffic Preemption written by Mark A. Lorenzen and published by . This book was released on 2011 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Limiting risk has been a long-standing objective in the fire service. The development of a tool that can assist in limiting risk while improving efficiency will be beneficial to the community. The problem is that first responders and the community may be exposed to unnecessary risks that are associated with emergency vehicles responding with red lights and sirens. Additionally, response times may be longer in the absence of an emergency vehicle traffic preemption (EVP) system. An analysis of these risks and a comprehensive evaluation of the results have never been completed. The purpose of this research is to evaluate the efficacy of such a system as it relates to response times and risk reduction. This research is only targeted at identifying whether risk and response time can be positively effected through the use of traffic preemption.

Download or read book Development of Closed Loop System Evaluation Procedures written by Eric J. Nelson and published by . This book was released on 2000 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Department of Transportation and Related Agencies Appropriations for 2003 2003 budget justifications written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of Transportation and Related Agencies Appropriations and published by . This book was released on 2002 with total page 1830 pages. Available in PDF, EPUB and Kindle. Book excerpt: