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Author: Francesc Soriguera Martí
Publisher: Springer
ISBN: 3662488582
Category : Technology & Engineering
Languages : en
Pages : 226
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Book Description
This monograph presents a simple, innovative approach for the measurement and short-term prediction of highway travel times based on the fusion of inductive loop detector and toll ticket data. The methodology is generic and not technologically captive, allowing it to be easily generalized for other equivalent types of data. The book shows how Bayesian analysis can be used to obtain fused estimates that are more reliable than the original inputs, overcoming some of the drawbacks of travel-time estimations based on unique data sources. The developed methodology adds value and obtains the maximum (in terms of travel time estimation) from the available data, without recurrent and costly requirements for additional data. The application of the algorithms to empirical testing in the AP-7 toll highway in Barcelona proves that it is possible to develop an accurate real-time, travel-time information system on closed-toll highways with the existing surveillance equipment, suggesting that highway operators might provide their customers with such an added value with little additional investment in technology.
Author: Francesc Soriguera Martí
Publisher: Springer
ISBN: 3662488582
Category : Technology & Engineering
Languages : en
Pages : 226
Get Book Here
Book Description
This monograph presents a simple, innovative approach for the measurement and short-term prediction of highway travel times based on the fusion of inductive loop detector and toll ticket data. The methodology is generic and not technologically captive, allowing it to be easily generalized for other equivalent types of data. The book shows how Bayesian analysis can be used to obtain fused estimates that are more reliable than the original inputs, overcoming some of the drawbacks of travel-time estimations based on unique data sources. The developed methodology adds value and obtains the maximum (in terms of travel time estimation) from the available data, without recurrent and costly requirements for additional data. The application of the algorithms to empirical testing in the AP-7 toll highway in Barcelona proves that it is possible to develop an accurate real-time, travel-time information system on closed-toll highways with the existing surveillance equipment, suggesting that highway operators might provide their customers with such an added value with little additional investment in technology.
Author:
Publisher:
ISBN:
Category : Motor fuels
Languages : en
Pages : 36
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Book Description
Author: United States. General Accounting Office
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 80
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Book Description
Author:
Publisher:
ISBN:
Category : Digital images
Languages : en
Pages : 202
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Book Description
Author: United States. Department of Commerce
Publisher:
ISBN:
Category : Advertising, Outdoor
Languages : en
Pages : 72
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Book Description
Author: Jamie Jensen
Publisher: Hachette UK
ISBN: 1640493859
Category : Travel
Languages : en
Pages : 1696
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Book Description
The Road Awaits! Criss-cross the country on America's classic two-lane highways with Road Trip USA! Inside you'll find: 11 of America's favorite road trips with a flexible network of route combinations, color-coded and extensively cross-referenced to allow for hundreds of possible itineraries Mile-by-mile highlights celebrating the best of Americana, including roadside curiosities, parks, diners, and more Local history that reveals the unique personalities of small towns and big cities across the country Vintage snapshots, full-color photos, and beautiful illustrations of America both then and now Over 125 detailed driving maps covering more than 35,000 miles of classic American blacktop Expert advice from road-warrior Jamie Jensen, who cruised nearly 400,000 miles of highway in search of the perfect stretches of pavement Road Trip USA celebrates the great American road trip, and gives you the tools, resources, and inspiration to make it your own. Hit the road!
Author: United States. Congress. House. Committee on Public Works. Special Subcommittee on the Federal-Aid Highway Program
Publisher:
ISBN:
Category : Traffic signs and signals
Languages : en
Pages : 676
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Book Description
Author: Jamie Jensen
Publisher: Moon Travel
ISBN: 1612389031
Category : Travel
Languages : en
Pages : 1526
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Book Description
The Road Awaits! Criss-cross the country on America's classic two-lane highways with Road Trip USA! Inside Road Trip USA you'll find: A flexible network of route combinations color-coded and extensively cross-referenced to allow for hundreds of possible itineraries Mile-by-mile highlights celebrating the best of Americana, including roadside curiosities, parks, diners, and the local history and personality that makes each small town and big city unique Over 125 detailed driving maps covering more than 35,000 miles of classic American blacktop Full-color photos and illustrations of America both then and now Expert advice from road-warrior Jamie Jensen, who sped along nearly 400,000 miles of highway in search of the perfect stretches of pavement Insight into the heart of the great American road trip, as well as resources and suggestions for the best books to read as you explore the US Road Trip USA is so full of the beauty of the American highway, why wait to start your next adventure? Hit the Road!
Author: Silin Ding
Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages : 80
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Book Description
Providing drivers with real-time, good-quality traveling information is becoming increasingly important as congestion increases in cities across the United States. Studies have shown as congestion increases, travel time reliability decreases. Travelers would like to have information about certain traffic conditions as particularly detours causing time delays, delays because of road constructions, and delays due to accidents. Since congestion is treated as a major factor influencing travel decisions, some metropolitan areas are providing travel time information to motorists through dynamic message signs (DMS), 511 programs, the Internet, highway advisory radio, and other sources. Traffic conditions are affected by current events and established travel patterns. Today, travel time data can be gathered from microwave radar, automatic vehicle tag matching, video detection, license plate matching, and most commonly, inductive loops. Loop detectors are placed in individual lanes to provide volume, occupancy and local speed information. Although closely spaced loop detectors are helpful to system operation, they are expensive to install and to maintain. With the proliferation of cell phone usage, loop detector data is no longer critical to incident detection. The effectiveness of using loop detector data to reliably estimate travel time has yet to be proved. In recent years, researchers discussed the pros and cons of detector spacing. This discussion is necessary and timely because of the widespread use of the loop detection system today. The focal point of the discussion is to determine the appropriate detector spacing needed for various applications while maintaining the same level of data quality for all users. This thesis studied different freeway travel time estimation methods and explored the impact of loop detector spacing on travel time estimation. The analysis was performed on a sixteen-mile stretch of I-75 in Cincinnati, Ohio and used both simulation and field tests to evaluate the results. First, the commonly used midpoint method for travel time estimation was examined under various traffic and roadway conditions. Starting with the existing 1/3 mile spacing, spacing was increased by using fewer detectors to obtain data for analysis. Then, enhancements were introduced over the midpoint method using different data processing methods reported by other researchers to improve its performance. Preliminary results showed that by using the midpoint method, different detector spacings result in different levels of accuracy and generally the estimation error increases with the detector spacing. Moreover, with increasing traffic congestion, the travel time errors from the existing methods increased significantly. After a congestion based error correction term is introduced, the improved midpoint method is able to make more accurate travel time estimates at larger spacings under work zone and incident conditions. The work was also tested against field data collected through probe vehicles. Based on field data, the estimated travel times from the improved method matches closely with those measured by the floating cars; the differences between the travel time are within 10%. Results from this study showed that a larger detector spacing than the commonly used 1/3 mile does not worsen the estimation results. Overall, the one-mile spacing scheme has outperformed the other tested alternatives in the testbed area. This thesis also studied the reliability of the probe vehicle technique. License Plate Matching Survey was conducted to carry out the analysis. The results showed that the accuracy of probe vehicle travel time is affected by the standard deviation of travel time and different analysis periods. Minimum sample size was examined as the last part of the thesis.
Author: David H. Roper
Publisher: Transportation Research Board
ISBN: 9780309049122
Category : Technology & Engineering
Languages : en
Pages : 36
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Book Description
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.
