nchrp 461 - jackson state university | challenging · web viewperformance-based seismic design...

NCHRP 420Operational and Institutional Agreements That Facilitate Regional Traffic Signal Operations

Accession Number:01352483

Record Type:Monograph

Record URL:http://onlinepubs.trb.org...bs/nchrp/nchrp_syn_420.pdf

Availability:Transportation Research Board Business Office

500 Fifth Street, NW

Washington, DC 20001 USA

Order URL: http://www.trb.org/Main/Blurbs/166052.aspxFind a library where document is available

Order URL: http://worldcat.org/isbn/9780309143394

Abstract:Regional Traffic Signal Operations Programs (RTSOPs) are a tool that regions can use to improve traffic flow as it crosses from one jurisdiction to another. One central focus of these programs is coordination of signal timing on multi-jurisdictional arterials. Another benefit is the creation of a central forum for consideration of other traffic operations measures to improve regional mobility. Although many RTSOPs have been established through regional metropolitan planning organizations, successful RTSOPs have been established by other organizations, including state and local departments of transportation, and government corporations. Information for this study was gathered through a literature review, a survey of RTSOPs, and selected interviews.

Supplemental Notes:Appendix D is web-only and can be found at www.trb.org by searching on "NCHRP Synthesis 420."

Report/Paper Numbers:Project 20-05, Topic 41-07

NCHRP 422Trade-Off Considerations in Highway Geometric Design

Accession Number:

01355863

Record Type:

Monograph

Record URL:

http://onlinepubs.trb.org...bs/nchrp/nchrp_syn_422.pdf

Availability:

Transportation Research Board Business Office



Order URL: http://www.trb.org/Main/Blurbs/166100.aspx

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Abstract:

This synthesis describes the processes that transportation agencies currently use to evaluate geometric

design trade-offs between competing interests. It also highlights existing key publications on conventional

approaches, context-sensitive solutions/context-sensitive design, and performance-based approaches, as

well as gaps in information or analysis processes available to support design decisions. The audience for

this report includes practitioners in transportation project development and delivery. Information used in

this study was acquired through a review of the literature and surveys.

Report/Paper Numbers:

Project 20-05 (Topic 40-07)

NCHRP 423Long-Term Performance of Polymer Concrete for Bridge Decks









Abstract:Thin polymer overlays (TPOs) consist of a polymer binder and aggregates with a thickness not exceeding 25 mm (1 in.). They have provided long-lasting wearing surfaces for bridge decks with many advantages, including adding very little dead load; very fast cure times; shallow depths that eliminate the need for raising approach slabs; ability to transition from overlaid lane to non-overlaid lane during construction; low permeability; and good frictional resistance. This study found that TPOs have become an accepted construction method for deck preservation, restoring surface friction and extending the lives of decks. When constructed properly on sound decks, TPOs should provide a service life of 20 or 25 years. Information was gathered through literature review, a survey of all state transportation agencies, and selected interviews.

Report/Paper Numbers:Project 20-05 (Topic 39-11)

NCHRP 424Engineering Economic Analysis Practices for Highway Investment



Blurb URL:http://www.trb.org/Main/Blurbs/167096.aspx





Order URL: www.trb.org/Main/Blurbs/167096.aspxFind a library where document is available


Abstract:This study has looked at how U.S. transportation agencies have applied engineering economics (benefit–cost analyses and similar procedures) to decisions on highway investments. State departments of transportation (DOTs) are most likely to use economic methods when considering investments in pavement and bridge preservation, safety improvements, and major projects on trunk lines and in urban areas. This study, however, has found agencies that use economic information across their key business and decision processes. Information was gathered through literature review, presentations at conference committee meetings, a screening survey of state DOTs, and interviews leading to case studies.


NCHRP 425Waterproofing Membranes for Concrete Bridge Decks










Abstract:The objective of this synthesis study was to update NCHRP Synthesis of Highway Practice 220, "Waterproofing Membranes for Concrete Bridge Decks," a report on the same topic published in 1995. This synthesis documents information on materials, specification requirements, design details, application methods, system performance, and costs of waterproofing membranes used on new and existing bridge decks since 1995. The synthesis focuses on North American practices with some information provided about systems used in Europe and Asia. Information used in this study was acquired through a review of the literature and surveys of state departments of transportation and Canadian provincial transportation agencies. For additional details, follow-up interviews were conducted with several agencies.


NCHRP 426Performance-Based Highway Maintenance and Operations Management



Record URL:http://www.trb.org/Main/Blurbs/167221.aspx






Abstract:This synthesis examines current performance-based management practices that are applied by state departments of transportation (DOTs) in highway maintenance and operations (M&O). Past studies have focused on the elements that make up a performance-based M&O approach, such as condition ratings, levels of service, performance measures, and threshold values. This study focuses on how state DOTs actually use performance-based measures to manage their highway programs. Information used in this study was acquired through a review of the literature, a survey of state DOTs, and follow-up interviews with four state DOTs to develop case examples of highway M&O performance management.


NCHRP 427

Extent of Highway Capacity Manual Use in Planning








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Abstract:The Highway Capacity Manual (HCM), a publication of the Transportation Research Board, is used for a variety of transportation facility and traffic engineering applications. This study reports on the current use of the HCM in transportation planning by federal, state, regional, and local agencies. The scope includes performance monitoring, problem identification, project prioritization, programming, and decision-making processes. Information was gathered through a literature review, a survey of selected agencies, and in-depth interviews.


NCHRP 428Practices and Procedures for Site-Specific Evaluations of Earthquake Ground Motions










Abstract:This study identifies and describes current practice and available methods for evaluating the influence of local ground conditions on earthquake design ground motions on a site-specific basis. Information includes criteria used to determine when a site-specific analysis is needed, how to develop input parameters required for a site-response analysis, the nature of the site-response analysis performed (equivalent-linear, total stress nonlinear, effective-stress nonlinear), the process of model setup, and how uncertainties are dealt with in the analysis process. Information was gathered by a literature review and a survey of state departments of transportation and selected academics.


NCHRP 429

Geotechnical Information Practices in Design-Build Projects







Find a library where document is availableOrder URL: http://worldcat.org/isbn/9780309223560

Abstract:Use of the design-build project delivery method by state agencies for transportation projects is increasing each year. This study reviews how states use geotechnical information in solicitation documents and contracts for design-build highway projects. The report examines current practices regarding the allocation of geotechnical risk and the level of geotechnical information provided with bid documents, the scope of geotechnical information required after contract award, geotechnical-related performance testing during construction, and contract provisions related to geotechnical design and construction. Information used in this study was gathered through a literature review, a survey of state departments of transportation (DOTs), analysis of design-build policy guidelines and solicitation documents from state DOTs, and interviews with design-build contractors. The report also provides case studies on legal and engineering geotechnical issues.


NCHRP 431

Practices to Manage Traffic Sign Retroreflectivity







Order URL: http://http://www.trb.org/Main/Blurbs/167037.aspxFind a library where document is available


Abstract:“Traffic sign retroreflectivity” is a sign property which, during nighttime, causes light from a vehicle’s headlamps to be reflected back to the driver, giving the sign an illuminated appearance. The federal government has established guidance to ensure that agencies responsible for traffic signs will bring their signs up to an acceptable standard of retroreflectivity. The objective of this study is to provide examples of effective practices that illustrate how different types of agencies can meet the retroreflectivity requirements. Information was gathered through a literature review and telephone surveys. Case studies are included for four different agencies that participated in the survey.


NCHRP 432

Recent Roadway Geometric Design Research for Improved Safety and Operations










Abstract:This synthesis report is an update of NCHRP Synthesis of Highway Practice 299 on the same topic published in 2001. It reviews and summarizes selected roadway geometric design literature completed and published from 2001 through early 2011, particularly research that identified impacts on safety and operations. The report is structured to correspond to chapters in AASHTO’s "A Policy on Geometric Design of Highways and Streets," more commonly referred to as the Green Book. Information for the synthesis study was collected using an extensive literature review and analysis.


NCHRP 434Use of the U.S. Census Bureau's Public Use Microdata Sample (PUMS) by State Departments of Transportation and Metropolitan Planning Organizations









Abstract:Census microdata are the confidential records of specific individuals and housing units from whom Decennial Census or American Community Survey responses have been obtained. The U.S. Census Bureau also draws a sample from the full set of microdata and makes these sampled records available in the Public Use Microdata Sample (PUMS) data products, so that users can develop their own tabulations. These data are being used by state departments of transportation (DOTs) and metropolitan planning organizations (MPOs) for studies, such as analyses of the commuting characteristics of population subgroups, and for supporting travel demand models and land use models. Information for this study of PUMS use was gathered by literature review, survey of selected state DOTs and MPOs, and in-depth interviews.


NCHRP 437Assessing the Long-Term Performance of Mechanically Stabilized Earth Walls










Abstract:Mechanically stabilized earth (MSE) walls are retaining walls that rely on internal reinforcement embedded in the backfill for stability. This study addresses methods currently used to assess long-term performance of MSE walls, where "long-term" denotes the period of time from approximately one year after the wall is in service until the end of its design life. The focus of the study is on state and federal agency wall inventories, including methods of inspection and assessment of wall conditions. Information was gathered through a literature review, agency survey, and selected interviews.

Supplemental Notes:Appendix E is included on the Web version of this report, making the total pages 211.


NCHRP 438Expedited Procurement Procedures for Emergency Construction Services










Abstract:Faced with disasters that close highways to the traveling public, state departments of transportation (DOTs) must undertake emergency procurement procedures to repair and reopen roadways. These procedures provide expedited delivery of contractor services. This study reports and discusses emergency procurement procedures being utilized by state DOTs, in coordination with federal agencies. Information for the study was gathered through a literature review and a survey of state DOTs and Federal Lands Highway Divisions. The study includes legal case studies.


Language:English

Authors:Gransberg, Douglas DLoulakis, Michael C

Pagination:114p

NCHRP 440Performance-Based Seismic Bridge Design








Order URL: http://www.trb.org/main/blurbs/168670.aspxFind a library where document is available


Abstract:Performance-based seismic design (PBSD) for bridges is a design process that links decision making for facility design rationally and scientifically with seismic input, facility response, and potential facility damage. The goal of PBSD is to provide decision makers and stakeholders with data that will enable them to allocate resources for construction based on levels of desired seismic performance. PBSD is an advance over current prescriptive bridge design methodologies. This report summarizes the current state of knowledge and practice for PBSD. Information for this study was acquired through literature review and a survey of state departments of transportation.


NCHRP 441High Performance Concrete Specifications and Practices for Bridges









Abstract:This synthesis documents the types of specifications and practices used by state transportation agencies to produce high performance concrete for bridges. The report also identifies specifications and practices reported as having improved concrete performance and those that have been less successful. Information used in this study was acquired through a review of the literature, a survey of state departments of transportation (DOTs), and follow-up interviews with selected state DOTs.


NCHRP 442Practical Highway Design Solutions

Accession Number:

01475128

Record Type:

Monograph

Blurb URL:

http://www.trb.org/Main/Blurbs/168619.aspx

Record URL:

http://onlinepubs.trb.org...bs/nchrp/nchrp_syn_443.pdf

Availability:

Transportation Research Board Business Office



Order URL: http://www.trb.org/Main/Blurbs/168619.aspx

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Abstract:

Some state departments of transportation (DOTs) have adopted design solutions—often labeled

"practical design"—for specific roadway projects at reduced costs, thereby allowing the agencies to better

address critical needs of the entire roadway system. This synthesis presents information on the

application of practical design approaches in roadway project development. Information used in this study

was acquired through a review of the literature, a survey of state DOTs, and follow-up interviews with six

state DOTs that have adopted formal practical design policies.

Report/Paper Numbers:

Project 20-05, Topic 43-05

NCHRP 443

Practical Highway Design Solutions










Abstract:Some state departments of transportation (DOTs) have adopted design solutions—often labeled "practical design"—for specific roadway projects at reduced costs, thereby allowing the agencies to better address critical needs of the entire roadway system. This synthesis presents information on the application of practical design approaches in roadway project development. Information used in this study was acquired through a review of the literature, a survey of state DOTs, and follow-up interviews with six state DOTs that have adopted formal practical design policies.


NCHRP 447

Synthesis of Information Related to Highway Problems. Topic 43-10. Active Traffic and Demand Management Strategies for Arterials Roadways


Record Type:Project

Record URL:http://apps.trb.org/cmsfe...Display.asp?ProjectID=3220

Abstract:The Transportation Research Board's (TRB's) National Cooperative Highway Research Program (NCHRP) Synthesis 447: Active Traffic Management for Arterials practices associated with the design, implementation, and operation of active traffic management (ATM) on arterial roadways. ATM includes a suite of strategies that are used to manage traffic flow in order enhance capacity and safety.

Contract Numbers:Proejct 20-05, Topic

Language:English

Sponsor Organizations:Federal Highway Administration

1200 New Jersey Avenue, SE

Washington, DC 20590 United States

American Association of State Highway & Transportation Officials444 North Capitol Street, NW, Suite 225


National Cooperative Highway Research Program (NCHRP) SynthesisTransportation Research Board


Washington, DC 20001

Project Managers:Gause, Jo Allen

NCHRP 461

Accelerating Implementation of Transportation Research Results01540143








Order URL: http://worldcat.org/isbn/9780309271387Abstract:This synthesis examines implementation practices used by public-sector nontransportation agencies, nonprofits, and academia to accelerate practical application of research results. The emphasis is on practices that might be useful for transportation agencies to create more responsive research programs. A series of implementation case examples and practices are presented. Information for this study was gathered through a comprehensive literature review of U.S. and selected international sources. Agency websites were searched and interviews were conducted with key individuals at case example agencies. After an introductory chapter, chapters addressed: factors affecting the use, timing, and ease of implementation; case examples and practice descriptions; replication and transferability of implementation strategies and practices; and conclusions and observations for going forward.


Language:English

http://worldcat.org/isbn/9780309271387


http://onlinepubs.trb.org/onlinepubs/nchrp/nchrp_syn_461.pdf


NCHRP 465

Permanent Signs Mounted on Median Barriers









Order URL: http://worldcat.org/isbn/9780309271554Abstract:This report compiles and documents information regarding the current state of practice for mounting permanent signs on top of rigid median barriers throughout the United States. A primary objective of this research is to assess the extent to which barrier-mounted signs are used and the level of consideration some practices give to potential safety concerns. Chapters address: sign and barrier design criteria and guidelines; existing sign and barrier combinations; and testing and research. Currently, tens of thousands of sign supports are mounted on rigid median barriers installed throughout the United States. The synthesis study identified a wide variety of practices currently in use throughout the United States. Some designs incorporate treatments intended to improve the safety performance of sign supports mounted on median barriers, while others follow older standards that were in use before the concept of the zone of intrusion was established. The study results indicate the need for additional research to help highway designers develop unique and standard details for mounting permanent signs on rigid median barriers.






NCHRP 466

Alliance Contracting—Evolving Alternative Project DeliveryAccession Number:01553693








Order URL: http://worldcat.org/isbn/9780309271561Abstract:Alliance contracting may be defined as a project delivery model where the owner(s), contractor(s), and consultant(s) work collaboratively as an integrated team and their commercial interests are aligned with actual project outcomes. The objective of this study is to identify and synthesize current effective practices that comprise the state of the practice related to the use of alliance contracts around the world and discuss the procurement procedures that have been used to successfully implement alliance contracting on typical transportation projects. The bulk of the information comes from a comprehensive literature review and 11 project case studies from Australia, New Zealand, the Netherlands, and the United Kingdom. The study finds that alliancing appears to be an excellent choice to deliver complex projects that require innovative solutions to the challenges presented in their scopes of work.


Language:English





NCHRP 468

Interactive Training for All-Hazards Emergency Planning, Preparation, and Response for Maintenance and Operations Field PersonnelAccession Number:01556286








Order URL: http://worldcat.org/isbn/9780309271585Abstract:The maintenance and operations personnel of state departments of transportation and the field personnel of local public works agencies are on the front lines during emergencies and disasters. Therefore, their preparedness is essential to public safety. The goal of this study was to identify interactive emergency training tools and sources appropriate for these field personnel, identify obstacles to implementation, and create a toolkit of relevant training and exercise information. The key focus for the synthesis is maintenance and operations field personnel and their managers. Findings were generated from literature review, a screening survey, and follow-up communications.


Language:English





NCHRP 469

Impacts of Energy Developments on U.S. Roads and Bridges









Order URL: http://worldcat.org/isbn/9780309271592Abstract:This report documents the economic impact of heavy truck traffic related to energy development on the nation’s roads and bridges. Strategies used by transportation agencies to minimize and pay for the damage caused by heavy loads are also documented. Information used in this study was acquired through a review of the literature, a survey of state transportation agencies, and interviews with selected federal and tribal agencies. Follow-up interviews with multiple agencies in five states selected for further study provided additional information. Chapter 1 provides an introduction to the report. Chapter 2 presents a literature review of energy development activities in the United States, highlighting energy development industries in the U.S., costs and revenue sources for public agencies, impacts on public roads and bridges as a result of energy development, strategies used by federal agencies and states, practices reported by federal agencies, and practices reported by tribal nations. Chapter 3 summarizes a survey on energy development impact on state and local roads and bridges, highlighting impact on infrastructure, engineering tools and design standards, economic impacts of energy development on roads and bridges, tools used to assess costs, impacts on roadway safety and operations, and defining the challenges to agencies. Chapter 4 presents case examples of state and local practices used to address energy development impacts in Colorado, Iowa, North Dakota, Pennsylvania and Texas. Chapter 5 presents a conclusion and identifies knowledge gaps.





NCHRP 472

FEMA and FHWA Emergency Relief Funds Reimbursements to State Departments of Transportation








Order URL: http://worldcat.org/isbn/9780309271707Abstract:This report compiles and documents information regarding state department of transportation (DOT) experiences with federal disaster reimbursement programs. The report documents existing experiences, knowledge, learning, and practices used by DOTs to efficiently obtain appropriate reimbursements after emergency events. It also summarizes the range of things DOTs are doing to ease their response effort, secure appropriate reimbursements, and simplify cost identification. Information used in this study was acquired through a literature review, a screening survey of state DOT members of the AASHTO Special Committee on Transportation Security and Emergency Management (SCOTSEM), and follow-up interviews with DOT staff. This report will be useful to highway design practitioners.


Language:English




NCHRP 473Indefinite Delivery/Indefinite Quantity Contracting Practices








Order URL: http://worldcat.org/isbn/9780309271738Abstract:This synthesis examines practices related to the use of Indefinite Delivery/Indefinite Quantity (IDIQ) contracting by transportation agencies for highway design, construction, and maintenance contracts. IDIQ allows for the delivery of services or products that are not known at the time the contract is executed. Sometimes called job order, push-button, on-call, stand-by, or master contracts, IDIQ provides a public agency with a great deal of flexibility to use the IDIQ contractor as much or as little as needed, depending on the requirements of the agency and the availability of funds. Information used in this study was gathered through a literature review, an analysis of IDIQ procurement documents from state departments of transportation, agency policy and procedure manuals, and follow-up interviews for examples. After an introductory chapter, the following chapters address: legal and contractual issues associated with IDIQ contracting; IDIQ procurement policies, procedures, and programs; contract administration procedures; and IDIQ contract examples. The concluding chapter summarizes effective practices and future research needs.





NCHRP 474

Service Life of Culverts








Order URL: http://worldcat.org/isbn/9780309271745Abstract:The objective of this study was to update the 1998 NCHRP Synthesis 254: Service Life of Drainage Pipe, which in turn updated the 1978 NCHRP Synthesis 50: Durability of Drainage Pipe. The study approach consisted of two primary thrusts. First, a survey of North American transportation agencies was performed to determine the current state of practice. Second, a literature review was performed to assess both the state of practice and the state of the art with regard to the subject topic. This study showed a diverse range of pipe types in common usage among the states, with concrete, corrugated galvanized steel, and high-density polyethylene (HDPE) pipes as the most common pipe types in use, followed by galvanized structural plate and polyvinyl chloride (PVC). Within the past 15 years there has been significant advancement in understanding the mechanisms of pipe degradation in service. Significant work has been done with respect to corrosion and the main factors that influence its development in concrete and metal pipes; that is, pH, resistivity, chloride, and sulfates. This has led to studies into how to retard or prevent corrosion by the use of thicker walls, better materials, coatings, and liners. Advances have also been made in a better understanding of abrasion and how it enhances the rate of degradation from corrosion, and how its damaging effects can be mitigated. There has also been effective research undertaken in understanding the time-dependent changes in mechanical properties of thermoplastic pipe, particularly slow crack growth and oxidative/chemical failure and how they can be controlled. Little recent advancement has been




made in refining pipe service prediction models, even for the more common pipe types. However, with the combination of research on the degradation mechanisms, a better understanding of the progression of deterioration, tied in with greater sources of pipe performance data from agency pipe inventories, in future more rapid progress in improving these models should be possible.


Language:English

NCHRP 475

Fiber Additives in Asphalt MixturesAccession Number:01557142





Order URL: http://worldcat.org/isbn/9780309271776Abstract:The report documents the current state of the practice regarding the use of fiber additives in asphalt mixtures. It outlines the many types of fibers that have been used, their properties and how they are tested, mix design tests for fiber mixes, the types of applications in which fibers have been used, and lab and performance of fiber mixes. This synthesis can aid state asphalt engineers and researchers on the use of fibers. A literature review and detailed survey responses from 48 of 50 state agencies, yielding a response rate of 96%, are provided. Also, six case examples offer more detailed information on the use of fibers.


Language:English



NCHRP 476

Practices for Permitting Superheavy Load Movements on Highway Pavements








Order URL: http://worldcat.org/isbn/9780309271783Abstract:This Synthesis captures the state of the practice in permitting superheavy commercial vehicles (SHCVs) or “superloads.” These are trucks that exceed the thresholds set for overweight vehicles allowed to operate with annual permits throughout state highway networks. Instead, SHCVs are issued single-trip permits on specific routes, following some type of engineering analysis. Work for this synthesis consisted of a literature review and a survey questionnaire. The literature review covered the SHCV permitting regulations and fees for the United States and the Canadian provinces, as well as efforts undertaken in Europe, Australia, and South Africa to harmonize weight regulations between their member states. The survey questionnaire was designed to collect additional detail on the practices that U.S. states and Canadian provinces implement to handle SHCV permits. Four case examples are provided that offer more detailed information on permitting practices. The findings of this study suggest that the practice of permitting SHCVs could be significantly improved through further study of their impact on pavements and implementation of the results in establishing equitable permit fees that cover pavement utilization and/or damage.





NCHRP 479

Service Life of Culverts








Order URL: http://worldcat.org/isbn/9780309271745Abstract:The objective of this study was to update the 1998 NCHRP Synthesis 254: Service Life of Drainage Pipe, which in turn updated the 1978 NCHRP Synthesis 50: Durability of Drainage Pipe. The study approach consisted of two primary thrusts. First, a survey of North American transportation agencies was performed to determine the current state of practice. Second, a literature review was performed to assess both the state of practice and the state of the art with regard to the subject topic. This study showed a diverse range of pipe types in common usage among the states, with concrete, corrugated galvanized steel, and high-density polyethylene (HDPE) pipes as the most common pipe types in use, followed by galvanized structural plate and polyvinyl chloride (PVC). Within the past 15 years there has been significant advancement in understanding the mechanisms of pipe degradation in service. Significant work has been done with respect to corrosion and the main factors that influence its development in concrete and metal pipes; that is, pH, resistivity, chloride, and sulfates. This has led to studies into how to retard or prevent corrosion by the use of thicker walls, better materials, coatings, and liners. Advances have also been made in a better understanding of abrasion and how it enhances the rate of degradation from corrosion, and how its damaging effects can be mitigated. There has also been effective research undertaken in understanding the time-dependent changes in mechanical properties of thermoplastic pipe, particularly slow crack growth and oxidative/chemical failure and how they can be controlled. Little recent advancement has been made in refining pipe service prediction models, even for the more common pipe types.




However, with the combination of research on the degradation mechanisms, a better understanding of the progression of deterioration, tied in with greater sources of pipe performance data from agency pipe inventories, in future more rapid progress in improving these models should be possible.


Language:English

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