To mitigate the impact of flooding due to climate change, engineers are expected to modify highway hydraulic designs. Overestimating climate change will result in costly over sizing of infrastructure, while underestimating may leave infrastructure vulnerable and their resultant flooding impacts on surrounding lands and structures inadequately addressed. Therefore, objectives of this study is to identify current resiliency of highway drainage infrastructure and to identify cost-effective adoption solution that extend service life despite not having been designed for climate change.