Heatwaves and their effects on transportation systems: A comprehensive review

This systematic literature review consolidates current knowledge and identifies research gaps regarding heat impacts across transportation asset classes. The analysis emphasizes quantifiable evidence from past studies, prioritizing data from developing regions that often bear the brunt of climate change consequences. The companion Issues Note, Preparing Resilient Transportation Systems for Heatwaves, presents a summary of the effects of heatwaves on transportation infrastructure and offers strategies for mitigation and adaptation.

Key findings of this report, include:

• A heatwave action roadmap with recommended action plans could help to understand and adapt to heatwave impacts on transport.
• Proactive actions, which are much less costly than reactive actions, can mitigate the impacts of heatwaves in a cost-efficient manner.
• Regional collaboration and regular evaluation based on public health indicators will be central to developing adaptive plans.
• Working across sectors and scales while addressing combined risk factors is key to building resilience.
• Developing and implementing metrics to assess progress toward heat mitigation is crucial.
• Communication campaigns paired with early warning systems, worker safety policies during heatwaves, and accessible indoor cooling facilities form indispensable risk management.
• Coordinating initiatives across different sectors and jurisdictions is essential.
• Updated regulations, policies, and codes addressing heat risks require development while exchanging insights globally.