Document Library

This research report supports the AASHTO Highway Safety Manual by establishing the methods for ensuring reliable results in crash prediction models.

The Fall 2021 issue is focused on Risk Management, and features the following articles and content:

• Managing Risk in the 21st Century
• Welcome from the AASHTO CPBM Risk Management Subcommittee Chair
• Weaving Risk Management into Your Agency, Every Day
• Communicating and Consulting with Stakeholders is Essential to Managing Risk
• UDOT’s ERM Journey
• A Risk and Resilience Roadmap to Better Performance-Based Asset Management
• Featured Transportation Risk Management Research
• Save the Date
• AASHTO ERM Portal
• Get Involved in a CPBM Subcommittee or Work Group
Publication Date: November 2021

Publisher: AASHTO, CPBM, The Transportation Pooled Fund

View Document

  View Detail  

This research report outlines a procedure for using crash modification factors (CMFs) to understand and quantify the effect of a transportation investment on the system. The report dives into great detail on how to select and adjust CMFs for different pavement and bridge assets, how to apply the CMFs in investment decisions, and how to develop new CMFs that account for important factors relating to the location and asset type.

This research roadmap for rural transportation identifies a series of research needs statements and projects encapsulated within a long-term research vision. Their studies reflect the opinions of a number of different rural transportation stakeholders and communities, and the topics include everything from aviation & marine transportation to transportation administration & management to intercity transit & active transportation. The purpose of this research is to support policy-driven investment and improve the safety and efficiency of the US rural transportation network.

This research report, published in 2021, highlights the knowledge gaps within the transportation industry pertaining to transportation system resilience strategies and plans. The report outlines a five-year research plan to address these shortcomings and presents the critical resilience-related issues facing practitioners today.

Transportation resilience comes in many forms, including natural disasters, unexpected infrastructure failures, and cyber attacks. Transportation agencies and the executives who lead them must be prepared to act quickly and efficiently to restore service to the system when adverse events occur. This brief report covers how CEOs can improve the resiliency of their organization through operational and strategic planning and strong understanding of the technical and policy factors.

This special report presents new methods and best practices for measuring transportation resilience and prioritizing resilience projects. Several methods for improving the resilience of an asset include strengthening the asset, adding redundancy to the network, or moving the asset entirely. Readers can find examples of resiliency metrics used by various agencies, a discussion on functionality recovery curves, and a decision-support framework for applying resilience analyses.

This report updates the Critical Issues in Transportation 2019, placing a renewed focus on correcting racial and social inequalities in the US transportation system and scrutinizing the systemic racism the transportation enterprise contains. While equity was mentioned in the 2018 report, the Black Lives Matter movement of 2020 and 2021 shed light on the breadth and depth of the social problems in the US. This report covers five areas of focus: access to transportation; institutional issues and decision-making; equity in planning and public participation; land use, affordable housing, and displacement; and Native American equity challenges.

The objective of this research is to develop a guidebook presenting principles, organizational strategies, governance mechanisms, and practical examples for improving management of the processes for collecting data, developing useful information, and providing that information for decision making about management of the transportation system assets.

The Spring 2021 issue of the TPM Newsletter is focused on transportation asset management (TAM) and performance management and features the following articles and content:

• Welcome from the AASHTO CPBM Vice Chair
• TAM: It’s How We Do Business
• PIARC: Taking It International
• MoDOT’s Partner Collaboration - Stronger Every Year
• Featured Transportation Asset Management Research
• Save the Date
• Staffing Changes
• FHWA State Performance Dashboard and Reports
• Get Involved in a CPBM Subcommittee or Work Group
• TAM Online Training Flyer

This report supports the evaluation of pavement treatments for road preservation and renewal by presenting a relevant framework, practices, and tools. Though targeted toward sprayed-seal flexible pavements, the findings in this report may be applied more broadly to all areas of asset management. A series of case studies in this report demonstrate among other things the importance of active intervention, justifications for different LOS, and the additional benefit of safety features in treatments.