Road Use Estimator Systems for Low Volume Roads PDF Download

Author: Fred Cammack
Publisher:
ISBN:
Category : Forest roads
Languages : en
Pages : 68

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Author: Ken Skorseth
Publisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112

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Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.

Author: Gordon Keller
Publisher:
ISBN: 9781998295333
Category :
Languages : en
Pages : 0

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Book Description
This Low-Volume Roads Engineering Best Management Practices Field Guide is intended to provide an overview of the key planning, location, design, construction, and maintenance aspects of roads that can cause adverse environmental impacts and to list key ways to prevent those impacts. Best Management Practices are general techniques or design practices that, when applied and adapted to fit site-specific conditions, will prevent or reduce pollution and maintain water quality. BMPs for roads have been developed by many agencies since roads often have a major adverse impact on water quality, and most of those impacts are preventable with good engineering and management practices. Roads that are not well planned or located, not properly designed or constructed, not well maintained, or not made with durable materials often have negative effects on water quality and the environment.

Author: W. James Wilde
Publisher:
ISBN:
Category : Bituminous materials
Languages : en
Pages : 62

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Many low-volume roadways in the county road system in the State of Minnesota consist of unpaved aggregate surfaces. It is the responsibility of the county engineer to make determinations regarding the design and maintenance of such roads and particularly for specific needs, such as weight restrictions. One method used by several counties in Minnesota is the construction of a bituminous-stabilized layer by adding several inches of new aggregate and stabilizing it with an engineered, water-based asphalt emulsion using mix-in-place methods. This report describes a design method providing highway engineers and their staffs with the technical backing needed for the designs selected. This report describes the design method for determining the required thickness of stabilized and unstabilized layers in this type of aggregate-surfaced road. This basic design method is based on the material properties and a correlation between layered-elastic analysis, dynamic cone penetrometer, and falling-weight deflectometer testing. The load rating analysis uses the Minnesota Department of Transportation methodology of estimating load rating on low-volume roads using falling weight deflectometer data. A software package is also presented which was developed as part of this project.

Author: Charles V. Zegeer
Publisher: Transportation Research Board
ISBN: 9780309053600
Category : Technology & Engineering
Languages : en
Pages : 116

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Author:
Publisher:
ISBN:
Category : Forest roads
Languages : en
Pages : 8

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Author: Leon Litz
Publisher:
ISBN:
Category :
Languages : en
Pages : 356

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Author: University of Wyoming. Department of Civil and Architectural Engineering
Publisher:
ISBN:
Category : Highway planning
Languages : en
Pages : 227

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Low-volume roads are excluded from regular traffic counts except on a need to know basis. But needs for traffic volume data on low-volume roads in road infrastructure management, safety, and air quality analysis have necessitated regular traffic volume estimates. This study developed traffic volume estimation models for low-volume roads in Wyoming. A review of existing estimation models was carried out. Two main model types were identified - regression models and Travel Demand Models (TDMs). The study developed the two model types and recommended the best model for implementation. Two regression models were developed, a linear and a logistic regression model. Each of the regression models was developed using data from 13 randomly selected counties and nine counties were used in model validation. The linear regression model had an R2 of 64 percent and was verified to be a good predictor of traffic volumes across Wyoming. The logistic regression model validation indicated a prediction accuracy ranging from 78 to 89 percent. The TDM was developed using standard factors and trip rates in the NCHRP Report 365. The TDM was implemented for four south eastern counties in Wyoming. The model was then validated and calibrated by comparing actual traffic volumes to those generated by the model. The calibrated model had a Percentage Root Mean Square Error and an R 2 values of 50 and 74 percent respectively. The report compared the three models with respect to cost-effectiveness, ease of use, and accuracy and recommended the TDM for implementation. The regression models were recommended for applications requiring quick traffic volume estimations and for which lower levels of accuracy are acceptable.

Author: United States. Congress. Senate. Committee on Public Works
Publisher:
ISBN:
Category :
Languages : en
Pages : 596

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Author: US Deparment of Transportation
Publisher: Transportation Department, Federal Highway Admin
ISBN: 9780160805127
Category : Reference
Languages : en
Pages : 216

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Book Description