Download or read book Development of Freeway Incident based Congestion Measures written by Mohammed A. Saif and published by . This book was released on 1998 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Travel Time Based Congestion Measures for Freeway Corridors written by Mei Chen and published by . This book was released on 2010 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Traffic Congestion written by United States. General Accounting Office and published by . This book was released on 1989 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Testing of a Freeway Recurring Congestion Measure written by Mousa F. Abbasi and published by . This book was released on 1998 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Freeway Incident Management written by David H. Roper and published by Transportation Research Board. This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis will be of interest to traffic engineers, planners, and others interested in how highway agencies deal with freeway incidents. Information is provided on the procedures and processes that highway agencies use to respond to traffic congestion caused by incidents on freeways. Congestion on freeways frequently is caused by incidents such as stalled vehicles or accidents that reduce the capacity of the freeway below the level of demand. This report of the Transportation Research Board describes the procedures and processes used by states to respond to traffic congestion caused by incidents on freeways.
Download or read book Urban Mobility Report 2004 written by David Schrank and published by DIANE Publishing. This book was released on 2008-10 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Congestion continues to grow in America¿s urban areas. This report presents details on the 2004 trends, findings and what can be done to address the growing transportation problems. Trend data from 1982 to 2002 for 85 urban areas provides both a local view and a national perspective on the growth and extent of traffic congestion. The 2004 Report provides clear evidence that the time for improvements has arrived. Communicating the congestion levels and the need for improvements is a goal of this report. The decisions about which, and how much, improvement to fund will be made at the local level according to a variety of goals, but there are some broad conclusions that can be drawn from this database. Tables.
Download or read book Intelligent Freeway Transportation Systems written by Robert Gordon and published by Springer Science & Business Media. This book was released on 2009-10-06 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intelligent Freeway Transportation Systems: Functional Design focuses on the efficient use of resources in the design of ITS. It discusses the principles of top down design starting with objectives and requirements, and provides guidance for the development and evaluation of functional design alternatives according to cost effectiveness principles. It shows how transportation planning principles such as Wardrop’s Laws and traffic diversion principles relate to functional ITS device selections and equipment locations. Methodologies for translating objectives to functional device types are provided. Application factors to identify device deployment densities (e.g. number of detectors per mile) as a function of traffic conditions are provided, as are evaluation models for evaluating the benefits of design alternatives based on traffic conditions. Design guidance and benefits evaluation include the following functions: (1) Non-recurrent congestion – Improvement of incident clearance time, (2) Non recurrent congestion – Incident information to motorists, (3) Recurrent congestion – Information to motorists, (4) Ramp metering, (5) Motorist service patrols.
Download or read book Estimating Incident Related Congestion on Freeways Based on Incident Severity written by Avinash Kripalani and published by . This book was released on 2006 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of traffic incidents on metropolitan freeways extend beyond causing congestion and delays. Immediate impacts include decreased productivity, increased pollution and reduced safety on highways. State and local governments spend billions of dollars annually on construction projects and Intelligent Transportation Systems (ITS) in an effort to curb the adverse consequences of incidents and incident related delays. Effective identification and response on highways is one key to reducing the costs associated with traffic incidents. Within the context of a prototype incident identification and response system developed by the University of Virginia's Systems Technology Integration Laboratory (STIL), this research aims to develop a statistical approach to modeling congestion associated with freeway incidents. The ability to predict congestion will provide more information and greater situational awareness to emergency responders and traffic managers, and will allow travelers to make more informed route selection decisions. By combining data from multiple sources, it is possible to match incident severity estimates for freeway incidents with associated traffic flow counts at the time of the accident. Four metrics for freeway congestion were derived from the traffic flow data, and these metrics were then modeled as functions of the incident severity estimates. The results of multiple linear regression analysis showed that quantifiable relationships exist between the congestion metrics and incident severity data such as the number of vehicles involved in an incident as well as the number of serious injuries reported at the scene.
Download or read book Feasibility of Incorporating Crash Risk in Developing Congestion Mitigation Measures for Interstate Highways written by Nicholas J. Garber and published by . This book was released on 2002 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A relationship between traffic flow variables and crash characteristics can greatly help the traffic engineer in the field to arrive at appropriate congestion mitigation measures that not only alleviate congestion and save time but also reduce the probability of crashes. Currently, no such decision support tool is readily available to traffic engineers who now mainly make vital decisions using their experience and intuition. This project investigated the feasibility of developing a methodology in which real-time data can be used to decide on diversion strategies that also consider crash risk. Models showing the interaction between flow and density (occupancy) and the relationship of these traffic flow parameters to crash characteristics were developed for specific sites in the Hampton Roads area of Virginia. These models were then used as the basis for developing a methodology that incorporates crash risk in identifying congestion strategies that consider crash risk. The results show that it is feasible to incorporate crash risk in developing congestion mitigation strategies. To use the methodology developed in this study, it is necessary to develop the appropriate models for each site that relate flow and occupancy and crashes and occupancy.
Download or read book Quantification of Urban Freeway Congestion and Analysis of Remedial Measures written by Jeffrey A. Lindley and published by . This book was released on 1986 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing a Methodology for Quantifying Non recurring Freeway Congestion Delay written by Amy Epps and published by . This book was released on 1993 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamic Traffic Flow Modeling for Incident Detection and Short term Congestion Prediction written by and published by . This book was released on 2005 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this report is to summarize the research activities that were performed during the first year of this research project. In conducting this research, the research team split into several independent groups, each focusing on different aspects of the problem. One group has been focused on using weather and traffic flow conditions as predictors of incident conditions. Their activities are summarized in Chapter II. Other groups have been focused on developing models for producing short-term forecasts of potential congestion, using current measured traffic conditions. The results of these activities are summarized in Chapter III. Finally, the authors are beginning the process of developing a prototype tool that operators can use in a control center to display forecasted conditions. The beginnings of a high-level, functional specification for the tool are provided in Chapter IV.
Download or read book Measuring Recurrent and Non recurrent Traffic Congestion written by Alexander Skabardonis and published by . This book was released on 2002 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper describes a methodology and its application to measure total, recurrent, and non-recurrent (incident related) delay on urban freeways. The methodology uses data from loop detectors and calculates the average and the probability distribution of delays. Application of the methodology to two real-life freeway corridorsone in Los Angeles and the other in the Bay Areaindicates that reliable measurement of congestion should also provide measures of uncertainty in congestion. In the two applications, incident-related delay is found to be between 13 to 30 percent of the total congestion delay during peak periods. The methodology also quantifies the congestion impacts on travel time and travel time variability.
Download or read book Developing a Methodology for Quantifying Non recurring Freeway Congestion Delay written by Amy Epps and published by . This book was released on 1993 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing Methodologies for Quantifying Freeway Congestion Delay written by Amy Epps and published by . This book was released on 1994 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Traffic Congestion written by United States. General Accounting Office and published by . This book was released on 1989 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multi criteria Trucking Freeway Performance Measures for Congested Corridors written by Nicole Marie Wheeler and published by . This book was released on 2010 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research focuses on the development of multi-criteria tools for measuring and analyzing the impacts of recurring and non-recurring congestion on freight corridors in the Portland Metropolitan Area. Unlike previous studies, this work employs several distinct data sources to analyze the impacts of congestion on Interstate 5 (I-5) in the Portland Metropolitan Area: global positioning system (GPS) data from commercial trucks and Oregon DOT corridor travel-time loop data and incident data. A new methodology and algorithms are developed to combine these data sources and to estimate the impacts of recurrent and non-recurrent congestion on freight movements' reliability and delays, costs, and emissions. The results suggest that traditional traffic sensor data tend to underestimate the impacts of congestion on commercial vehicles travel times and variability. This research also shows that congestion is not only detrimental for carriers and shippers costs but also for the planet due to major increases in GHG emissions and for the local community due to large increases in NOx, PM, and other harmful pollutants. The methodology developed throughout this work has the potential to provide useful freight operation and performance data for transportation decision makers to incorporate freight performance measures into the planning process.
