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Determination of the Impacts of Connected and Automated Vehicles (CAV) on Pavement Design, Rehabilitation, and Materials Selection.

Description:

Connected and automated vehicles (CAV) are growing in popularity for the traveling public and the trucking industry. There are many advantages to using CAV, but they present challenges as well. The existing physical and digital infrastructures for transportation owners are not equipped to support these vehicles without major financial investments from public and/or private institutions. The changes in travel patterns, vehicle spacing, wheel wander and other aspects may accelerate the deterioration and performance of pavements. Additionally, recognizing the slow pace of adoption of new design standards and coupled with the fact that pavement assets are typically designed for 20 plus years, it’s imperative that this research on the impacts of CAV on pavements design, rehabilitation and materials be undertaken now to facilitate adoption and implementation by pavement asset owners.

Objective:

1. Provide an estimate of the uptake and impact CAV on the performance of pavements and materials.

  1. Develop a guideline document for pavement practitioners on how to initially consider these impacts in their pavement design policies and practices.
Benefits:

This research will provide practitioners with appropriate guidance on how to account for the impact of CAV in their pavement design policies and practices. Pavements are designed with service lives generally ranging from 15 to 50 years. However, significant uptake of CAV is anticipated to occur within the next decade. Therefore, without this research, there is substantial risk that the impacts of CAV will be considered too late in the lifecycle of many pavements.

Related Research:

A search through TRID did not find anything related to the direct impact on infrastructure which is why this research is needed. Everything related to CAV is generally about safety, capacity, interactions, and freight. The closest research so far is the ongoing NCHRP 20-102(15) work. To date, much of the research and funds have focused on digital infrastructure to connect CAV with communications systems. As an example, some work is currently underway through NCHRP 20-102(15) “Understanding the Impacts of the Physical Highway Infrastructure Caused by the Increased Prevalence of Advanced Vehicle Technologies”. However, the focus of this work is on traffic control devices. While that work is vitally important, very little investigation has been done on the potential impacts on transportation owners’ largest asset – pavements.

Tasks:

1. Perform a literature review of on-going/completed research related to the anticipated

uptake of CAV. This task would extend the efforts undertaken under NCHRP 20-10.

  1. Perform a literature review of on-going/completed research related to the changes in

vehicle behavior that may impact pavement performance (i.e., structural and functional),

design, rehabilitation and materials policies for transportation agencies

  1. Identify potential pavement design/performance impacts of CAV on new or existing

structures through various stakeholders such as owners, car manufacturers, systems

developers, industry, and material vendors.

  1. Review and identify sections in the AASHTO 1993/98 Guide for the Design of Pavement Structures that will be impacted by CAV

  2. Summarize the expected impacts based on the level of uptake.

  3. Determine gaps in current design methodologies based on tasks 1 through 5

  4. Develop research plan (i.e., Roadmap) to evaluate the gaps and propose further

research needs statements to address the gaps.

  1. Provide a guideline document including the results of the above task to include initial

guidelines for addressing the potential impacts.

Implementation:

The intent of this research is to provide practical guidance that could be used by all local, state and federal agencies that own pavements. No institutional or political barriers to implementation are anticipated.

Sponsoring Committee:AFD60, Flexible Pavement Design
Research Period:24 - 36 months
Research Priority:High
RNS Developer:Marta Juhasz
Date Posted:02/12/2020
Date Modified:02/21/2020
Index Terms:Connected vehicles, Autonomous vehicles, Pavement design, Rehabilitation (Maintenance), Paving materials, Pavements,
Cosponsoring Committees: 
Subjects    
Highways
Design
Maintenance and Preservation
Pavements
Vehicles and Equipment

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