Abstract
This paper provides an outlook on the effects of climate change and the severity and frequency of extreme weather events on the performance of flexible pavements across North America. Now more than ever, the climate is changing at a rapid pace, which will alter long-term environmental loading parameters and extreme weather events. Such alterations will pose implications for the design, maintenance, and rehabilitation of flexible pavements, especially in terms of their serviceability, safety, and functionality. In northern Canada, roads are founded on various terrain types, including thaw-sensitive ice-rich permafrost underlying terrains. Such roads have experienced signs of embankment and pavement damage, which are usually induced by the degradation of the underlying permafrost due to climate change. Therefore, the development and implementation of new permafrost thaw mitigation techniques for vulnerable roads are essential and will be discussed in this paper. Resilient flexible roads should be designed to withstand the conditions that are likely to occur during their design life, taking into account the impact of the climate change on pavement performance in response to daily and seasonal changes in heat, precipitation, freeze–thaw cycles, and extreme weather events.
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Acknowledgments
The authors wish to express their appreciation for the National Research Council of Canada (NRC) and Climate Resilient Building-Core Public Infrastructure for their financial support and guidance. Special thanks go to NRC CO-OP Student Ethan Murphy for his editing assistance.
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Crown Copyright © 2021 Published by American Society of Civil Engineers.
History
Received: Feb 3, 2020
Accepted: Jun 28, 2021
Published online: Aug 11, 2021
Published in print: Dec 1, 2021
Discussion open until: Jan 11, 2022
ASCE Technical Topics:
- Asphalt pavements
- Climate change
- Climates
- Cold regions engineering
- Design (by type)
- Engineering fundamentals
- Environmental engineering
- Frost
- Geography
- Geomatics
- Gravels
- Highway and road design
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Pavement condition
- Pavement design
- Pavements
- Permafrost
- Sight distances
- Terrain
- Transportation engineering
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