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Author: Douglas W. Harwood
Publisher: Transportation Research Board
ISBN: 0309087791
Category : Express highways
Languages : en
Pages : 194
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Book Description
Author: Douglas W. Harwood
Publisher: Transportation Research Board
ISBN: 0309087791
Category : Express highways
Languages : en
Pages : 194
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Book Description
Author:
Publisher: Aashto
ISBN:
Category : Express highways
Languages : en
Pages : 20
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Book Description
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: OECD
Publisher: OECD Publishing
ISBN: 9282102963
Category :
Languages : en
Pages : 361
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Book Description
This report identifies potential improvements in terms of more effective safety and environmental regulation for trucks, backed by better systems of enforcement, and identifies opportunities for greater efficiency and higher productivity.
Author:
Publisher: Amer Assn of State Hwy
ISBN: 9781560510314
Category : Bridge railings
Languages : en
Pages : 352
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Book Description
This document presents a synthesis of current information and operating practices related to roadside safety and is developed in metric units. The roadside is defined as that area beyond the traveled way (driving lanes) and the shoulder (if any) of the roadway itself. The focus of this guide is on safety treatments that minimize the likelihood of serious injuries when a driver runs off the road. This guide replaces the 1989 AASHTO "Roadside Design Guide."
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309159474
Category : Science
Languages : en
Pages : 251
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Book Description
Technologies and Approaches to Reducing the Fuel Consumption of Medium- and Heavy-Duty Vehicles evaluates various technologies and methods that could improve the fuel economy of medium- and heavy-duty vehicles, such as tractor-trailers, transit buses, and work trucks. The book also recommends approaches that federal agencies could use to regulate these vehicles' fuel consumption. Currently there are no fuel consumption standards for such vehicles, which account for about 26 percent of the transportation fuel used in the U.S. The miles-per-gallon measure used to regulate the fuel economy of passenger cars. is not appropriate for medium- and heavy-duty vehicles, which are designed above all to carry loads efficiently. Instead, any regulation of medium- and heavy-duty vehicles should use a metric that reflects the efficiency with which a vehicle moves goods or passengers, such as gallons per ton-mile, a unit that reflects the amount of fuel a vehicle would use to carry a ton of goods one mile. This is called load-specific fuel consumption (LSFC). The book estimates the improvements that various technologies could achieve over the next decade in seven vehicle types. For example, using advanced diesel engines in tractor-trailers could lower their fuel consumption by up to 20 percent by 2020, and improved aerodynamics could yield an 11 percent reduction. Hybrid powertrains could lower the fuel consumption of vehicles that stop frequently, such as garbage trucks and transit buses, by as much 35 percent in the same time frame.
Author:
Publisher:
ISBN:
Category : Electronic book
Languages : en
Pages :
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Author: American Association of State Highway and Transportation Officials
Publisher:
ISBN: 9781560511618
Category : CD-ROMs
Languages : en
Pages : 905
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Book Description
Author: Marcus Brewer
Publisher: Transportation Research Board
ISBN: 0309223598
Category : Technology & Engineering
Languages : en
Pages : 90
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Book Description
RB’s National Cooperative Highway Research Program (NCHRP) Synthesis 432: Recent Roadway Geometric Design Research for Improved Safety and Operations reviews and summarizes roadway geometric design literature completed and published from 2001 through early 2011, particularly research that identified impacts on safety and operations.
Author: American Association of State Highway and Transportation Officials
Publisher: AASHTO
ISBN: 1560515082
Category : Technology & Engineering
Languages : en
Pages : 907
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Book Description
