This report provides a detailed analysis of the supply chains of key food commodities inAfrica and sheds light on how transport deficiencies affect production, distribution, and imports and ultimately, food security across the continent. While many studies have been carried out to explain the persistent food insecurity problem in Africa, the report is the first to use a supply chain approach to provide comprehensive view how transport, logistics, and storage affect food security. The analysis uses the World Bank's in-house Freight Flow and Transport Choice Model (FlowMax) to explore the movement of food between production and consumption including global trade. The model tracks the flow of four essential commodities (namely Maize, Cassava, Wheat, and Rice) which provide almost half of Africa's caloric intake, to provide insights how weaknesses and gaps in the supply chain affect the flow of these commodities within a country, between countries, and with overseas markets.