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Author : Anonim
Publisher : Unknown
Page : 640 pages
File Size : 40,5 Mb
Release : 2008
Category : Highway planning
ISBN : UIUC:30112118828703
Author : Travis M. Gerber
Publisher : Transportation Research Board
Page : 211 pages
File Size : 48,5 Mb
Release : 2012
Category : Science
ISBN : 9780309223744
"Mechanically stabilized earth (MSE) walls are an important class of infrastructure assets whose long-term performance depends on various factors. As with most all other classes of assets, MSE walls need periodic inspection and assessment of performance. To date, some agencies have established MSE wall monitoring programs, whereas others are looking for guidance, tools, and funding to establish their own monitoring programs. The objective of this synthesis project is to determine how transportation agencies monitor, assess, and predict the long-term performance of MSE walls. The information used to develop this synthesis came from a literature review together with a survey and interviews. Of the 52 U.S. and 12 Canadian targeted survey recipients, 39 and five, respectively, responded. This synthesis reveals that unlike bridges and pavements, MSE walls and retaining walls in general are often overlooked as assets. Fewer than one-quarter of state-level transportation agencies in the United States have developed some type of MSE wall inventory beyond that which may be captured as part of their bridge inventories. Fewer still have the methods and means to populate their inventories with data from ongoing inspections from which assessments of wall performance can be made. In the United States, there is no widely used, consistently applied system for managing MSE walls. Wall inventory and monitoring practices vary between agencies. This synthesis examines existing practices concerning the nature, scope, and extent of existing MSE wall inventories. It also examines the collection of MSE wall data, including the types of performance data collected, how they are maintained in wall inventories and databases, the frequency of inventory activities, and assessment practices relevant to reinforcement corrosion and degradation. Later parts of this synthesis discuss how MSE wall performance data are assessed, interpreted, and used in asset management decisions. This synthesis finds that the most well-implemented wall inventory and assessment system in the United States is the Wall Inventory Program developed by FHWA for the National Park Service. However, this system, like some others, uses 'condition narratives' in a process that can be somewhat cumbersome and subjective. Other systems use more direct numeric scales to describe wall conditions, and an advantage of such systems is that they are often compatible with those used in assessments of bridges. As experience with MSE walls accumulates, agencies will likely continue to develop, refine, and better calibrate procedures affecting design, construction, condition assessment, and asset management decisions. One portion of this synthesis is dedicated to summarizing the actions taken thus far by survey respondents to improve the long-term performance of their MSE walls. Many agencies prescribe the use of a pre-approved wall design and/or wall supplier. Other actions or policies frequently focus on drainage-related issues."--Summary.
Author : Anonim
Publisher : Unknown
Page : 208 pages
File Size : 51,6 Mb
Release : 2005
Category : Highway research
ISBN : NWU:35556039351168
Author : Anonim
Publisher : Transportation Research Board
Page : 82 pages
File Size : 48,6 Mb
Release : 2009
Category : Express highways
ISBN : 9780309117753
Explores a framework for applying asset-management principles and practices to managing Interstate Highway System investments.
Author : Parsons Brinckerhoff,Edward P. Chait,Cambridge Systematics,National Cooperative Highway Research Program
Publisher : Transportation Research Board
Page : 135 pages
File Size : 55,9 Mb
Release : 2008
Category : Highway departments
ISBN : 9780309099325
TRB¿s National Cooperative Highway Research Program (NCHRP) Report 608: GASB 34¿Methods for Condition Assessment and Preservation examines methodologies that integrate infrastructure inventory, condition assessments, minimum acceptable condition levels, and funding decisions with Governmental Accounting Standards Board (GASB) Statement No. 34 reporting requirements. The report also examines the operational and financial impacts of reporting under GASB 34. NCHRP Report 608 updates the findings contained in NCHRP Report 522: A Review of DOT Compliance with GASB 34 Requirements.
Author : Anonim
Publisher : Unknown
Page : 40 pages
File Size : 41,8 Mb
Release : 2008
Category : Highway research
ISBN : NWU:35556038305413
Author : John A. Bissonette,Patricia Catherine Cramer,National Cooperative Highway Research Program
Publisher : Transportation Research Board
Page : 174 pages
File Size : 53,9 Mb
Release : 2008
Category : Nature
ISBN : 9780309117401
TRB¿s National Cooperative Highway Research Program (NCHRP) Report 615: Evaluation of the Use and Effectiveness of Wildlife Crossings explores development of an interactive, web-based decision guide protocol for the selection, configuration, and location of wildlife crossings.
Author : American Association of State Highway and Transportation Officials
Publisher : AASHTO
Page : 458 pages
File Size : 52,8 Mb
Release : 2011
Category : Business & Economics
ISBN : 9781560514992
Aims to encourage transportation agencies to address strategic questions as they confront the task of managing the surface transportation system. Drawn form both national and international knowledge and experience, it provides guidance to State Department of Transportation (DOT) decision makers, as well as county and municipal transportation agencies, to assist them in realizing the most from financial resources now and into the future, preserving highway assets, and providing the service expected by customers. Divided into two parts, Part one focuses on leadership and goal and objective setintg, while Part two is more technically oriented. Appendices include work sheets and case studies.
Author : Anonim
Publisher : Unknown
Page : 184 pages
File Size : 49,8 Mb
Release : 2008
Category : Pavements
ISBN : NWU:35556030778179
Study analyzed responses of an extensive survey completed by over 400 local agencies in Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio and Wisconsin. The report identifies current pavement management practices, factors that promote management system implementation, and the challenges (organizational, cultural and technical) that impede implementation. Researchers also conducted in-depth review of the models that had been adopted for use in the RoadSoft® GIS Pavement Strategy module.
Author : Anonim
Publisher : Unknown
Page : 64 pages
File Size : 48,5 Mb
Release : 2008
Category : Highway research
ISBN : SRLF:DD0001166032
Author : United States. Department of Transportation
Publisher : Unknown
Page : 96 pages
File Size : 48,9 Mb
Release : 2005
Category : Electronic
ISBN : NWU:35556036065944
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 48,9 Mb
Release : 2006
Category : Assets (Accounting)
ISBN : 047310685X
Manual provides guidelines for best management practices for all infrastructure assets in the public and private sectors at the lowest life cycle cost.
Author : United States. Congress. House. Committee on Science and Technology
Publisher : Unknown
Page : 100 pages
File Size : 52,5 Mb
Release : 2008
Category : Bridges
ISBN : PSU:000063507706
Author : Anonim
Publisher : Unknown
Page : 578 pages
File Size : 53,7 Mb
Release : 2008
Category : Highway research
ISBN : CUB:P205081906003
Author : Anonim
Publisher : Unknown
Page : 698 pages
File Size : 42,5 Mb
Release : 2008
Category : Electronic
ISBN : NWU:35556038319935