Collection: NCHRP Reports
NCHRP Reports are the main product of NCHRP research projects and are often written as guidebooks or manuals. This collection features all of the NCHRP Reports posted on the TAM Portal to date.
To search the resources by state either click on the state from the map or select a state from the dropdown under search filters.
This report presents guidelines to transportation agencies for the management of their assets related to return on investment. The details in the report rely upon the work conducted by the research team and their experiences. It is published alongside a spreadsheet tool which helps agencies evaluate their simulations of return on investment for TAM.
This document provides an explanation of the steps taken to develop the risk register tool. The research team conducted a survey of current practices for risk management across state DOTs, international agencies, and non-transportation organizations. Then they built a draft tool and received user feedback before finalizing the tool.
NCHRP Synthesis 556 summarizes state DOT practices used to identify pavement and bridge asset locations repeatedly damaged by emergency events and to mitigate the risk of recurring damage in those locations. The synthesis focuses particularly on mitigation practices that concurrently advance TAM and TPM objectives. Information for this synthesis was gathered through a literature review, a survey of state DOTs, and follow-up interviews with selected agencies.
Data Management and Governance Practices (NCHRP Synthesis 508) | Research Report
Case Studies in Cross-Asset, Multi-Objective Resource Allocation (NCHRP Report 921) | Guide/Manual, Research Report
This report extends and implements the results of NCHRP Report 806: Cross-Asset Resource Allocation and the Impact on System Performance. Case studies were used to illustrate key issues in implementing a cross-asset resource allocation approach, and the lessons learned were then used to improve the guidance and tools developed in NCHRP Report 806.
This report presents a manual that can be used to implement Geotechnical Asset Management (GAM) planning.
There are several downloadable files that accompany Volume 2.
This report presents guidance for state departments of transportation (DOTs) and other agencies conducting financial analyses and developing financial plans to support efficient and effective management of the agency’s transportation assets.
Automated Pavement Condition Surveys (NCHRP Synthesis 531) | Research ReportAsset Management, Pavement
This synthesis report documents agency practices, challenges, and successes in conducting automated pavement condition surveys. The report also includes three case examples that provide additional information on agency practices for conducting automated pavement surveys.
This report presents guidance and examples for selection of peer groups to ensure that benchmarking is effectively applied to enhance transportation system performance. The report includes practical guidance on how transportation agencies can undertake benchmarking to improve system performance management practices and highlights applications of the guidance in two specific components of system performance, for active (that is, non-motorized) transportation and environmental impact.
This report documents current practices used by transportation agencies to make investment decisions about low-volume roads. Current transportation asset management practices for low-volume roads typically use asset condition, traffic, and safety metrics to prioritize investment decisions for preservation, maintenance, repair, and replacement projects. However, these metrics do not fully measure the significant value for the wider economy and society that low-volume roads can provide.
This report provides practical guidance to transportation agencies to help improve their use of data for performance management. Recent federal legislation has highlighted the importance of data utilization in performance management. The guidance focuses on six areas of the data life-cycle allowing for analysis on decisions and to identify opportunities for improvement. The purpose of this report is to allow for agencies to enhance their insight into their performance and to boost results.
The NCHRP 20-24 Task 124 Performance Management Reporting Peer Exchange was held on Tuesday October 16th and Wednesday October 17th, 2018 at the Hall of States in Washington D.C. Representatives from 18 state DOTS, the Federal Highway Administration (FHWA), the American Association of State Highway and Transportation Officials (AASHTO) and the Transportation Research Board (TRB) attended. Participants were subject matter experts in performance management, pavement management and communications. The goal of the Peer Exchange was to help DOTs develop a toolkit and strategies for communicating the difference between state and Federal pavement performance in a consistent narrative. While this Peer Exchange focused on pavement performance, the process can be used as a framework to develop strategies to help states communicate other performance measures. A toolkit and summary are available in addition to the final report.
This report from NCHRP Synthesis 20-05/Topic 48-13 Resilience in Transportation Planning, Engineering, Management, Policy, and Administration, explores how agencies are incorporating resilience practices through project development, policy, and design. The information gathered details the motivations behind the policies that promote highway resilience, definitions of risk and resilience, and the relationship between these two fields.
Assessing Risk for Bridge Management (NCHRP 20-07 (378)) | Guide/Manual, Research ReportAsset Management, Bridge
The objective of this research is to develop proposed AASHTO guidelines for a data-driven risk assessment at the bridge and structure level. The guidelines considered risks from natural and man-made hazards and aimed to be useful in a bridge management system.
Asset Management (NCHRP 20-07 Task 120) | Research Report
For this NCHRP Project 20-07/Task 120 Asset Management, the consultant assisted the AASHTO Task Force on Transportation Asset Management by coordinating numerous on-going activities and by contributing to the development of the AASHTO Strategic Plan for Asset Management. The consultant coordinated the business of the Task Force with the FHWA, AASHTO members, and other public and private agencies regarding the operation, improvement, and preservation of transportation assets. The consultant helped coordinate and facilitate a workshop on asset management held in Scottsdale, Arizona, on December 1-3, 1999.
Consequences of Delayed Maintenance of Highway Assets (NCHRP 14-20A) | Research ReportAsset Management, Bridge, Pavement
The objective of this research, NCHRP Project 14-20A Consequences of Delayed Maintenance of Highway Assets, was to develop processes for quantifying the consequences of the delayed application of maintenance treatments on highway pavements, bridges, and other physical assets. The research expressed consequences in terms of performance indicators (e.g., distress and level of service), costs to owners and road users, and other relevant factors and defined delayed maintenance applications by (1) the inability to meet the agency-defined application schedule or (2) the available budget relative to an unconstrained budget (i.e., availability of the funds required to perform all needed maintenance).
The objectives of this project, NCHRP 14-09(4) Role of Highway Maintenance in Integrated Management Systems, were to design an idealized Maintenance Management Information System (MMIS) based on data available from all transportation information systems and develop a guide to assist state transportation agencies in moving toward implementation.
The final report has been published as NCHRP Report 363, "Role of Highway Maintenance in Integrated Management Systems." This report outlines a framework for integrating maintenance management with other highway and administrative management functions. This framework considers the next generation of maintenance management systems, and how they must respond to the organizational, political, and technological trends that have emerged in recent years.
The report can be found at http://onlinepubs.trb.org/Onlinepubs/nchrp/nchrp_rpt_363.pdf
Guide for Optimal Replacement Cycles of Highway Operations Equipment (NCHRP 13-04) | Guide/Manual, Research Report
The objective of this research, NCHRP 13-04, was to develop a Guide for Optimal Replacement Cycles of Highway Operations Equipment. The guide included processes and tools for consideration in making decisions regarding the optimal replacement cycles of on- and off-road highway operations equipment used by state highway agencies.
The study’s report, Research Report 879: Optimal Replacement Cycles of Highway Operations Equipment, acts as a handbook on equipment replacement concepts and an instruction manual for making cost-effective replacement decisions. The research report presents a process for determining replacement needs for highway operations equipment, identifying candidate equipment units for replacement, and preparing an annual equipment replacement program. The products include a guidance document and an Excel-based replacement optimization tool to support the equipment replacement process and facilitate its implementation.
TAM Gap Analysis Tool (NCHRP 08-90) | Research Report
The objective of this research was to develop a TAM gap analysis tool for state DOT and local transportation practitioners to facilitate their implementation of TAM. The tool was formulated as a spreadsheet application based on the prototype presented in TAM, Volume 2 (developed through NCHRP and published by AASHTO), with refinements responsive to (a) requirements of MAP-21 and anticipated FHWA rulemaking and (b) institutional and technical characteristics of U.S. transportation system management practices.
The objective of TRB's National Cooperative Highway Research Program (NCHRP) Project 08-36(Task 128) was to evaluate Design Visualization Methods and their applicability to transportation planning and analysis. The report, Web-Only Document 226: Data Visualization Methods for Transportation Agencies, provides techniques for planners who have various levels of experience with displaying and reporting information in a visual format. It includes practices for developing visualization skills, enhancing transportation analysis, and improving public engagement.
TAM Knowledge Portal (NCHRP 08-36 Task 125A) | Research Report, Website
The AASHTO TAM Portal is a transportation asset management knowledge portal: a searchable database of links to a wide range of resources related to transportation asset management. The interactive portal is designed to provide transportation asset management practitioners with the ability to search and access relevant documents and/or web links to information from multiple sources. The report documents the results of the activities carried out under the continuation of NCHRP Project 08-36(125).
Performance Measures for State Infrastructure Preservation (NCHRP 08-36 Task 118) | Guide/Manual, Research ReportAsset Management
This Report, from NCHRP 08-36/Task 118, is on Performance Measures for State Infrastructure Preservation. It provides a roadmap with some guidance on the highest priorities for agencies to successfully apply performance-based preservation programming. The roadmap is broken into three tiers. Every transportation agency has a different level of maturity in data collection and analysis, asset management, performance management, target setting, and other activities which support performance-based preservation programming. The tiers are intended to provide guidance to those agencies with limited maturity, those with moderate maturity, and those with significant maturity in performance-based preservation programming.
The objectives of this research for NCHRP 02-25 are the following:
1. To produce a roadmap of effective human capital strategies for state DOTs, identifying critical areas necessary in the future to attract, retain, and develop a sustainable, qualified transportation design, construction, and maintenance workforce;
2. To identify trends, policies, and processes critical for developing and maintaining an adaptive organizational framework that will attract, retain, and develop a qualified workforce beyond 2030; and
3. To prepare an evidence-based guide that transportation industry organizations may use when developing and establishing an effective human capital program for a qualified workforce into 2030 and beyond.
The scope will be limited to the transportation workforce in design, construction, and maintenance.
This 2016 synthesis report presents a comprehensive scan of current methods and approaches to life-cycle cost analysis (LCCA) within highway agencies. The report features a literature review and individual case studies. It also includes the results of an agency survey.
NCHRP Synthesis 408 - Pavement Marking Warranty Specifications | Research ReportAsset Management, Pavement
This NCHRP research project, conducted between 2007 and 2009, explores a process by which state DOTs can make decisions regarding fleet management. The research highlights the outsourcing and privatization of maintenance, and culminated in the creation of NCHRP Report 692, produced under project 13-03A. To view the report, click here.
Estimating Life Expectancies of Highway Assets | Research ReportAsset Management, Bridge, Pavement
An NCHRP report which offers guidance for understanding and predicting the life expectancy and condition of highway assets, in order to effectively implement asset management practices and better maintain an agency's highway assets.
Click here for project information.
Click here for Volume 1, the guidebook.
Click here for Volume 2, the final report.
This NCHRP Synthesis was designed to observe the impact of asset management in state highway agencies. The use of a self-assessment survey, followed by a second survey focused on state of practice and the agency's future, helped to evaluate the current influence of asset management and allowed for identification of future needs.
Produced as part of the NCHRP Project 20-83 Series on Long-Range Strategic Issues, this research was conducted to facilitate development of highway infrastructure planning by exploring maintenance, preservation, and renewal issues and needs.
NCHRP Synthesis 111 - Microsurfacing | Research ReportAsset Management, Pavement
The objective of this research was to develop a guidebook and tool prototype that senior DOT managers may use to analyze and communicate the likely system performance impact of investment decisions across multiple types of transportation assets. The guidebook includes a framework incorporating (a) the several dimensions of system performance important to stakeholders (such as mobility, safety, and community livability); (b) the multiple measures an agency uses to describe condition and service of particular classes of transportation-system assets (such as pavements, signals, and drainage structures); and (c) the targets that an agency may set for the various dimensions of performance.
The framework and tool prototype were developed under NCHRP Project 08-91 to reflect both technical best practices and transportation agency organizational and institutional needs.
ADA Compliance at Transportation Agencies | Research Report
Transportation agencies nationwide must comply with provisions in the Americans with Disabilities Act (ADA). To assess ADA compliance, agencies need to develop a comprehensive inventory of pedestrian facilities, identify non-compliant locations, and develop a program for remedial repairs in order to bring facilities into compliance. The purpose of NCHRP Project 20- 07, Task 249, Asset Management Approaches to ADA Compliance, was to gather information and develop a synthesis of practices, including best practices, on the various approaches transportation agencies use to address ADA compliance issues. The synthesis covered three main topics: asset data inventory, asset condition assessment, and programming of asset improvements. To make the project manageable, the focus was on pedestrian infrastructure on the public right-of-way, including elements such as sidewalks, curb ramps, pedestrian crossings, and obstructions. The analysis did not include buildings, facilities, or transit infrastructure. The synthesis also included the compilation of an extensive listing of asset inventory and condition data elements. The listing is intended as a preliminary menu that agencies could use as a foundation for the development of inventory programs that meet individual agency needs.
Improved Right-of-Way Procedures and Business Practices | Research Report
Several State Departments of Transportation (DOTs) are considering revising their right-of-way business practices with the goal of simplifying and streamlining processes. Current right-of-way practice and procedure manuals are the products of 40 years of statutes, case law, regulations, management styles and best practices. The procedural manuals have chapters to cover elements such as: a) appraisal; b) appraisal review; c) relocation planning and assistance; d) relocation eligibility and supplemental payments; e) nonresidential relocations; f) acquisition and negotiations; g) legal settlements; h) eminent domain; i) titles and closing; j) property management; k) leasing; l) sale of excess property; m) mapping and geographic information systems (GIS); n) encroachments; o) contracting for services; and p) administrative costs. Procedures and guidelines are often an accumulation of historical practice or those adopted from other agencies. State procedures vary widely because of differences in State laws. Local agencies are required to follow State DOT procedural manuals when they use State or Federal funding. Questions arise as new staff try to understand the reason or underlying basis for requirements. Contractors and consultants face a wide array of requirements and forms among the various States. This research is in support of the AASHTO Highway Subcommittee Right-of-Way and Utility strategic plan to provide leadership and support to member agency right-of-way staff. This research will provide new direction and lead to immediate cost savings by reducing the hours required to accomplish certain functions. This research will result in streamlined business practices that are easier to maintain, cost effective and result in delivery of projects sooner. Research is needed to provide information to State DOTs and local agencies to rationally evaluate current right-of-way procedures and business practices; to determine what function is served by each procedure; to determine the need for each procedure, i.e. statute or practice; to document the benefits and operational logic for continuing a procedure, modifying, or eliminating it, evaluate the cost of maintaining current procedures and to quantify the benefits from them. This includes, but is not limited to, the current cost of agents, training new agents and administrative costs on a parcel or tract basis. Determine what processes are essential to providing a consistent product and comply with statutory requirements, such as the Uniform Relocation Assistance and Real Property Acquisition Policies Act of 1970 (Uniform Act), as well as the most common elements of State eminent domain laws, identify institutional, political, and economic barriers to the adoption of procedures that will be easier to maintain for the next 20 years, and examine and compare several common types of existing FHWA approved right-of-way manuals used by State DOTs and local agencies and common State regulations. Agencies will be contacted and staff will be interviewed to ascertain what are the origins, purpose and authorities for the existing procedures; what criteria and procedures are needed, as a minimum, to protect owner and tenant rights; what procedures would work if the agency could start anew; how and/or whether procedures might be modified for local agency use, i.e., a stand alone manual for local agencies; what are the issues in administering procedures that need to be addressed to assure consistent application; and what are the institutional, political, and economic barriers to implementation? A major objective of the research will be to develop a rationale or basis for a new or modified approach. This will include an objective analysis of all key elements mentioned above, i.e., appraisal, appraisal review, relocation, etc. This research would culminate by analyzing the typical right-of-way business model for the four major elements of appraisal, acquisition, relocation, and property management, and developing a revised model that is less costly to maintain. It would outline a sample procedural manual with forms that could be used to administer a simplified and cost-effective right-of-way program that is responsive to national statutes and the Uniform Act. The resulting business model would be accompanied by a cost/benefit analysis and recommended roll-out implementation plan that could be readily adopted and applied by State DOTs and local agencies for national consistency. One of the initial goals of the Uniform Act was to create a fair and consistent process for the acquisition of real property by public agencies. This research would help us assure the continued uniformity of the process. This research will be a direct follow-on to the 2008 International Scan for ROW and Utilities called "Integrating & Streamlining Right of Way and Utility Processes with Planning, Environment, and Design." Ideas and strategies derived from the 2008 International Scan will feed directly into revised business practices. State DOTs who undertake pilot projects in 2009 will be able to use lessons learned and provide input to this research effort. The timing is beneficial for all parties in that this research product will bring about full implementation of the 2008 streamlining strategies. This research will provide new direction and lead to immediate cost savings by reducing the hours required to accomplish certain functions. This research will result in streamlined business practices that are easier to maintain, cost effective and result in delivery of projects sooner. The effort devoted to training new right-of-way agents, who may or may not stay with the agency, is becoming cost prohibitive and is time consuming. It is anticipated that there will be many institutional barriers to overcome. Many right-of-way agents have adapted to the current procedures and will be resistant to change. State DOT legal staff also may resist changes, thinking that revised procedures may affect property owner rights. In order to address these barriers, the final research report should contain an outline of a revised procedural manual that would be sufficient to meet Federal regulations and laws, allowing each State to augment this information with specifics to address that particular State's laws.
This report describes how risk management and data management may be used by transportation agencies to support management target-setting for performance-based resource allocation. As the final product of a second phase of NCHRP Project 08-70, Target-Setting Methods and Data Management to Support Performance-Based Resource Allocation by Transportation Agencies, this report supplements NCHRP Report 666, "Target-Setting Methods and Data Management to Support Performance-Based Resource Allocation by Transportation Agencies: Volume I: Research, Volume II: Guide for Target-Setting and Data Management," published in 2010. Transportation agencies at all levels of government are embracing performance measurement to improve agency efficiency and accountability. Setting performance targets generally entails balancing competing objectives and dealing with political implications in a context of uncertainties about economic conditions, fiscal constraints, climate conditions, customer demands, and more. Good data on the transportation system and its performance provides the information managers need to set targets, but good management depends on clear understanding of the risks that future conditions will differ significantly from what today's best information suggests. Performance targets and consequent resource-allocation decisions established with such understanding are more likely to ensure that the agency and the transportation system perform well. This report presents advice and illustrative case studies, in the form of primers, on using risk management and data management practices in support of performance-based resource allocation, and specifically performance-target setting. The information will be useful to senior agency managers seeking to develop and improve their performance-management practices.
Transportation agencies are developing procedures and guidelines for managing the quality of pavement data collected to ensure the data meet the needs of the pavement management process. This study reviews the quality management practices being employed by public highway agencies for automated, semi-automated, and manual pavement data collection and delivery. Information was gathered through literature review, surveys of U.S. state and Canadian province public agencies and private contractors, and selected interviews.
This fifteenth volume of NCHRP Report 525: "Surface Transportation Security" is a guide referred to as CAPTA, which stands for Costing Asset Protection: An All Hazards Guide for Transportation Agencies. CAPTA supports mainstreaming an integrated, high-level, all-hazards, National Incident Management System (NIMS)-responsive, multimodal, consequence-driven risk management process into transportation agency programs and activities by providing a convenient and robust planning tool for top-down estimation of both capital and operating budget implications of measures intended to reduce risks to locally acceptable levels. CAPTA is intended for use by senior managers whose jurisdiction extends over multiple modes of transportation, multiple asset classes, and many individual assets. The CAPTA methodology provides a means for moving across transportation assets to address system vulnerabilities that could result in significant losses given the threats and hazards of greatest concern. This guide was reviewed by many state and local agencies and was pilot tested by the Maryland Department of Transportation (DOT), the Massachusetts Bay Transportation Authority (MBTA), and the Virginia DOT.
GASB 34—Methods for Condition Assessment and Preservation | Research ReportAsset Management
This report updates the findings contained in NCHRP Report 522, "A Review of DOT Compliance with GASB 34 Requirements." NCHRP Report 522 provided a comprehensive look at approaches taken by AASHTO member departments to comply with the requirements of Governmental Accounting Standards Board (GASB) Statement No. 34. NCHRP Report 608 provides a recommended practices guide that identifies effective methodologies that integrate infrastructure inventory, condition assessments, minimum acceptable condition levels, and funding decisions with GASB 34 reporting requirements and assesses the operational and financial impacts of reporting under GASB 34. This report will be helpful to professionals who work with state departments of transportation and local governments in the areas of finance, auditing, asset management, and policymaking.
This report presents models for estimating the effects of pavement condition on vehicle operating costs. These models address fuel consumption, tire wear, and repair and maintenance costs and are presented as computational software on the accompanying CD-ROM, CRP-CD-111, to facilitate use. The material contained in the report should be of immediate interest to state pavement, construction, and maintenance engineers; vehicle fleet managers; and those involved in pavement investment decision processes and financial aspects of highway transportation.
This report presents a logic framework for allocating limited highway asset preservation funds among competing demands to achieve high levels of system performance. The report also presents a spreadsheet-based computational tool that implements the framework. The tool uses linear programming optimization to allocate resources across asset classes or geographic regions, subject to constraints that typically must be considered in such decisionmaking, to achieve target asset performance or condition levels. Prototypical application scenarios and case-study examples illustrate how transportation agency staff may use the framework to assist resource allocation decisionmaking.
NCHRP Web Document 41: Asset Management Framework | Research Report
The objectives of this study were to gather information on asset management practices in the United States and overseas, develop a framework for transportation asset management, and apply this framework to produce the "Transportation Asset Management Guide." Phase I of the study encompassed information gathering, framework development, and recommendation of a research program. The products of Phase I have been issued in three separate volumes. This report constitutes the second volume, addressing a comprehensive transportation asset management framework. This framework defines transportation asset management within the context of this study, and establishes its basic concepts and elements. Its management approach is built on the idea that an agency's processes for resource allocation and utilization are at the core of asset management. Based on this concept, the report builds a framework for agency self-evaluation of its current and desired practices. This framework identifies key characteristics and criteria of transportation asset management in four basic areas relating to resource allocation and utilization: policy goals and objectives, planning and programming, program delivery, and information and analysis. State-of-the-art practices illustrate each of these characteristics and criteria to provide benchmarks by which agencies may establish targets for incremental improvement and gauge progress toward these targets. The report also discusses strategies for updating legacy management systems and data to better support asset management, and examines the relationship between transportation asset management and recently adopted standards for financial reporting of transportation infrastructure assets.
NCHRP Web Document 41: Synthesis of Asset Management Practice | Research Report
The objectives of this study were to gather information on asset management practices in the United States and overseas, develop a framework for transportation asset management, and apply this framework to produce the "Transportation Asset Management Guide." Phase I of the study encompassed information gathering, framework development, and recommendation of a research program. The products of Phase I have been issued in three separate volumes. This report constitutes the first volume, providing a synthesis of current information and practices in asset management.