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Author: Mohammad Abu-Hassan Publisher: ISBN: Category : Pavements, Asphalt Languages : en Pages : 80
Book Description
In May 2000, the Colorado Department of Transportation (CDOT) requested a forensic study of a project located on I-24 north of Denver. The request was made because, within a year of the 1997 overlay, longitudinal cracking appeared in the surface. Transverse cracks were attributed to reflective cracking. However, the longitudinal cracks appeared to be surface initiated. In October 2000, a forensic team reviewed the project and established a sampling and testing plan to take cores from the roadway. Based on data analysis of the cores, the higher than expected in-place air voids, the low effective asphalt, and segregation within the mat, all contributed to the early cracking.
Author: Publisher: ISBN: Category : Local transit Languages : en Pages : 156
Book Description
The objective of this document is to provide a single source of sketch planning data on the most important performance characteristics of contemporary urban transportation systems in a format that lends itself to easy reference. This handbook does not deal explicitly with passenger demand, but assesses also the supply or performance characteristics of urban transportation systems, including the following: speed; capacity; operating costs; labor inputs; capital costs; energy consumption; emission of air pollutants; and, accident rates and costs. The following modes are discussed: rail transit (rapid, light, and commuter); bus transit; automobiles, trucks, and the highway system; high occupancy vehicle (HOV) lanes; and, automated guideway transit (AGT).
Author: Mohammad Abu-Hassan Publisher: ISBN: Category : Pavements, Asphalt Languages : en Pages : 80
Book Description
In May 2000, the Colorado Department of Transportation (CDOT) requested a forensic study of a project located on I-24 north of Denver. The request was made because, within a year of the 1997 overlay, longitudinal cracking appeared in the surface. Transverse cracks were attributed to reflective cracking. However, the longitudinal cracks appeared to be surface initiated. In October 2000, a forensic team reviewed the project and established a sampling and testing plan to take cores from the roadway. Based on data analysis of the cores, the higher than expected in-place air voids, the low effective asphalt, and segregation within the mat, all contributed to the early cracking.
Author: Duncan Taylor Publisher: Universal-Publishers ISBN: 1599423693 Category : Languages : en Pages : 97
Book Description
The environmental reports of 12 Scottish Strategic Environmental Assessments have been subject to critical analysis in order to assess the extent to which they include Cumulative Effects Assessment (CEA) as a required component under the SEA directive. The anticipated benefits of assessing Cumulative Effects in a strategic setting are wide-ranging and well researched, yet there appears little documented evidence of this in the Scottish context. The level of Cumulative Effects inclusion in the reports studied was investigated, along with the parameters that appear to limit the success of the lauded relationship between these environmental assessment tools. An 8 criteria review-based methodology was constructed, based on a best-practice framework from the extensive literature synthesis provided, and it served to evaluate Cumulative Effects inclusion throughout the assessment process. In addition, the authors of 5 of the 12 Environmental Reports were interviewed to gauge understanding on the phenomenon of Cumulative Effects, Cumulative Effects Assessment, and how it is best integrated into SEA. The results of these interviews were then subject to thematic analysis, and compared to the findings of the review criteria. The findings of this research suggested CEA is a low priority in Scottish SEA practice. CEA was found to be carried out in an irregular and sometimes reluctant fashion. In particular, the Environmental Reports under scrutiny showed only limited CEs considerations and methodologies. In interview, practitioners provided largely inadequate definitions of Cumulative Effects and showed limited conceptual understandings of Cumulative Effects Assessment. Overall, CEA appears undervalued as an assessment tool in arguably its most appropriate context.
Author: Lee August Rodegerdts Publisher: Transportation Research Board ISBN: 0309155118 Category : Technology & Engineering Languages : en Pages : 407
Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.
Author: Yunping Xi Publisher: ISBN: Category : Concrete bridges Languages : en Pages : 166
Book Description
Corrosion of reinforced concrete structures has been a significant problem for many state and transportation agencies since the application of deicing salts was introduced. Much research has been conducted to develop corrosion protection systems that can prolong the life span of reinforced concrete structures. The Colorado Department of Transportation (CDOT) has several routine and experimental measures to prevent corrosion of the rebar including epoxy-coated rebar, calcium nitrite admixture, organic corrosion inhibitors, a thick cover of quality concrete, and a waterproofing membrane covered by an asphalt overlay. An extensive literature review was performed to collect information on various corrosion protection systems that have been used in the U.S. and around the world. Current CDOT practices in terms of corrosion protection measures were reviewed. A draft inspection plan for Colorado's bridge structures was proposed.
Author: Deirdre D. Kyle Publisher: Transportation Research Board ISBN: 030927091X Category : Minority business enterprises Languages : en Pages : 94
Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 448: State Department of Transportation Small Business Programs identifies successful strategies that maximize Disadvantaged Business Enterprise program achievements through race-neutral measures." -- Publisher's description.
Author: Donna S. Harmelink Publisher: ISBN: Category : Pavements, Asphalt concrete Languages : en Pages : 64
Book Description
In 2000, a forensic evaluation was conducted on a project that was exhibiting early longitudinal cracking near the wheel paths. A team of national asphalt experts conducted this forensic evaluation. The forensic team concluded that the cracking on the project was surface initiated cracking and was caused by a number of contributing factors. One of the contributing factors to the early distress that was identified by the experts were the pockets of segregation that were observed at the bottom of the surface lift but were not apparent on the surface. The object of this study was to determine the extent of "top-down cracking" in Colorado, what causes it, how can it be prevented, if it occurs how is the distress treated, and how quickly does the distress need to be treated.
Author: Xianming Shi Publisher: John Wiley & Sons ISBN: 1119185068 Category : Technology & Engineering Languages : en Pages : 476
Book Description
The first and only comprehensive guide to best practices in winter road operations Winter maintenance operations are essential to ensure the safety, mobility, and productivity of transportation systems, especially in cold-weather climates, and responsible agencies are continually challenged to provide a high level of service in a fiscally and environmentally responsible manner. Sustainable Winter Road Operations bridges the knowledge gaps, providing the first up-to-date, authoritative, single-source overview and guide to best practices in winter road operations that considers the triple bottom line of sustainability. With contributions from experts in the field from around the world, this book takes a holistic approach to the subject. The authors address the many negative impacts on regional economies and the environment of poorly planned and inadequate winter road operations, and they make a strong case for the myriad benefits of environmentally sustainable concepts and practices. Best practice applications of materials, processes, equipment, and associated technologies and how they can improve the effectiveness and efficiency of winter operations, optimize materials usage, and minimize cost, corrosion, and environmental impacts are all covered in depth. Provides the first up-to-date, authoritative and comprehensive overview of best practices in sustainable winter road operations currently in use around the world Covers materials, processes, equipment, and associated technologies for sustainable winter road operations Brings together contributions by an international all-star team of experts with extensive experience in designing, implementing, and managing sustainable winter road operations Designed to bring professionals involved in transportation and highway maintenance and control up to speed with current best practice Sustainable Winter Road Operations is essential reading for maintenance professionals dealing with snow and ice control operations on highways, motorways and local roads. It is a valuable source of information and guidance for decision makers, researchers, and engineers in transportation engineering involved in transportation and highway maintenance. And it is an ideal textbook for advanced-level courses in transportation engineering.
Author: Mohammad Abu-Hassan
Author: Bonnie Harper-Lore
Author: 
Author: Mohammad Abu-Hassan
Author: 
Author: Duncan Taylor
Author: Lee August Rodegerdts
Author: Yunping Xi
Author: Deirdre D. Kyle
Author: Donna S. Harmelink
Author: Xianming Shi