Performance Measures For Analyzing Real Time Freeway Operations PDF Download
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Author | : Robert E. Brydia |
Publisher | : |
Total Pages | : 46 |
Release | : 2003 |
Genre | : Express highways |
ISBN | : |
Download Performance Measures for Analyzing Real-time Freeway Operations Book in PDF, ePub and Kindle
The concept of real-time performance measurement analyzes feedback from the operational response to freeway incident conditions and provides a quantitative methodology for assessing the impacts of various operational strategies. The significance of this technique is that it can enhance the efficiency of freeway incident management. Even a small percent reduction in the length of an incident would accrue millions of dollars of time-savings for the affected portion of the roadway. The design and construction of a real-time performance measurement system require an understanding of the performance measures and their application to transportation, a review of the state-of-the-practice in performance measurement, and an experimental design on which to build a prototype system.
Author | : Robert E. Brydia |
Publisher | : |
Total Pages | : 80 |
Release | : 2006 |
Genre | : Express highways |
ISBN | : |
Download Background Development and Concept of Operations for a Real-time Performance Measurement Monitoring System Book in PDF, ePub and Kindle
Author | : National Cooperative Highway Research Program |
Publisher | : Transportation Research Board |
Total Pages | : 79 |
Release | : 2008 |
Genre | : Traffic congestion |
ISBN | : 0309117410 |
Download Cost-effective Performance Measures for Travel Time Delay, Variation, and Reliability Book in PDF, ePub and Kindle
TRB¿s National Cooperative Highway Research Program (NCHRP) Report 618: Cost-Effective Performance Measures for Travel Time Delay, Variation, and Reliability explores a framework and methods to predict, measure, and report travel time, delay, and reliability from a customer-oriented perspective.
Author | : Terrel Shaw |
Publisher | : Transportation Research Board |
Total Pages | : 66 |
Release | : 2003 |
Genre | : Roads |
ISBN | : 030906953X |
Download Performance Measures of Operational Effectiveness for Highway Segments and Systems Book in PDF, ePub and Kindle
The Transportation Research Board's National Cooperative Highway Research Program (NCHRP) Synthesis 311: Performance Measures of Operational Effectiveness for Highway Segments and Systems examines the use of performance measures for the monitoring and operational management of highway segments and systems.
Author | : |
Publisher | : |
Total Pages | : 88 |
Release | : 2008 |
Genre | : Express highways |
ISBN | : |
Download Operations-oriented Performance Measures for Freeway Management Systems Book in PDF, ePub and Kindle
This report describes the second and final year activities of the project titled "Using Operations-Oriented Performance Measures to Support Freeway Management Systems." Work activities included developing a prototype system architecture for testing the use of performance measures in real-time. Outputs from this effort included operator's screens, a prototype database, and a concept of operations for using the real-time measures. Additional work showcased the application of a multi-criterion screening approach to the selection of competing performance measures.
Author | : Jillian Lyon |
Publisher | : |
Total Pages | : 30 |
Release | : 2014 |
Genre | : Adair County (Iowa) |
ISBN | : |
Download Quantifying Uncertainty in Real Time Performance Measurement for Highway Winter Maintenance Operations Book in PDF, ePub and Kindle
Winter weather in Iowa is often unpredictable and can have an adverse impact on traffic flow. The Iowa Department of Transportation (Iowa DOT) attempts to lessen the impact of winter weather events on traffic speeds with various proactive maintenance operations. In order to assess the performance of these maintenance operations, it would be beneficial to develop a model for expected speed reduction based on weather variables and normal maintenance schedules. Such a model would allow the Iowa DOT to identify situations in which speed reductions were much greater than or less than would be expected for a given set of storm conditions, and make modifications to improve efficiency and effectiveness. The objective of this work was to predict speed changes relative to baseline speed under normal conditions, based on nominal maintenance schedules and winter weather covariates (snow type, temperature, and wind speed), as measured by roadside weather stations. This allows for an assessment of the impact of winter weather covariates on traffic speed changes, and estimation of the effect of regular maintenance passes. The researchers chose events from Adair County, Iowa and fit a linear model incorporating the covariates mentioned previously. A Bayesian analysis was conducted to estimate the values of the parameters of this model. Specifically, the analysis produces a distribution for the parameter value that represents the impact of maintenance on traffic speeds. The effect of maintenance is not a constant, but rather a value that the researchers have some uncertainty about and this distribution represents what they know about the effects of maintenance. Similarly, examinations of the distributions for the effects of winter weather covariates are possible. Plots of observed and expected traffic speed changes allow a visual assessment of the model fit. Future work involves expanding this model to incorporate many events at multiple locations. This would allow for assessment of the impact of winter weather maintenance across various situations, and eventually identify locations and times in which maintenance could be improved.
Author | : |
Publisher | : Transportation Research Board |
Total Pages | : 118 |
Release | : 2013 |
Genre | : Highway departments |
ISBN | : 0309286697 |
Download Performance Measurement of Transportation Systems Book in PDF, ePub and Kindle
Each track consisted of a plenary session followed by three concurrent breakout sessions. These proceedings follow the conference format, with the plenary sessions and the breakout sessions for each of the five tracks presented in chronological order. The breakout sessions and the closing session gave participants the opportunity to provide ideas and suggestions on further research, technology transfer, and training. Research topics identified for potential consideration are listed in the section on concluding remarks. The conference also featured an interactive poster session. Summaries provided by the poster authors are presented in Appendix A. The conference attracted 130 participants from Canada, Germany, Japan, the Netherlands, South Africa, and the United States, and featured transportation specialists who offered real-world expertise on the application of performance metrics and case studies.
Author | : |
Publisher | : |
Total Pages | : 368 |
Release | : 1972 |
Genre | : |
ISBN | : |
Download An analysis of real-time contorl measures for calculating urban freeway operation Book in PDF, ePub and Kindle
Author | : Roy Clyde Loutzenheiser |
Publisher | : |
Total Pages | : 316 |
Release | : 1972 |
Genre | : |
ISBN | : |
Download An Analysis of Real-time Control Measures for Calculating Urban Freeway Operation Book in PDF, ePub and Kindle
Author | : Catherine C. McGhee |
Publisher | : |
Total Pages | : 28 |
Release | : 2001 |
Genre | : Express highways |
ISBN | : |
Download Evaluation of Methods for Freeway Operational Analysis Book in PDF, ePub and Kindle
The ability to estimate accurately the operational performance of roadway segments has become increasingly critical as we move from a period of new construction into one of operations, maintenance, and, in some cases, reconstruction. In addition to maintaining flow on our existing roadways, we are faced daily with issues of allocating funds to maintenance activities that will ensure the roadways continue to serve the needs into the future. This includes identifying needs for expansion, additional freeway interchanges, and changes in operational strategies, including HOV lanes or other lane restrictions designed to facilitate efficient traffic flow. Limitations on available funding make up-front analysis of alternative improvement strategies even more important. Traditional methods of analysis such as those provided in the Highway Capacity Manual were not designed to address many of the issues that are commonly faced today. In response, traffic engineering professionals have begun to employ more advanced tools for operational analysis. These tools often involve simulation models that provide very detailed measures of performance based on detailed user input. Based on the experiences of the Virginia Department of Transportation with respect to simulation models and the results of studies documented in the literature, basic guidelines are presented for the use of simulation analysis for freeways in Virginia. Several models we found to provide reasonable results in particular situations. It is, therefore, critical to identify the characteristics of the network to be analyzed and select the best tool based on these characteristics.