Climate change and SLR will result in high economic costs for road infrastructure in sub-Saharan Africa  . Across Africa as a whole, potential cumulative costs estimates through 2100 range from USD 183.6 billion  to USD 248.3 billion  to repair and maintain existing roads damaged by temperature and precipitation changes directly related to projected climate change  . Climate-related road damage and associated repairs will be a significant financial burden to countries, but to varying degrees according to flood risk, existing road asset liability, topography and rural connectivity, among other factors . For example, Mozambique is projected to face estimated annual average costs of USD 123 million for maintaining and repairing roads damaged directly by precipitation and temperature changes from climate change through 2050 in a median climate change scenario for a policy that does not consider climate impacts during road design and construction . Risk of river flooding to bridges in Mozambique under current conditions is estimated to be USD 200 million, equal to 1.5% of its GDP per year, and could rise to USD 400 million per year in the worst-case climate change scenario by 2050 .
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report