Kinshasa is the largest French-speaking city in the world with a population of just over 17 million.
Funding for the "Kin Elenda" project will include a credit and grant of $250m each, the World Bank said.
"Kin Elenda will help change the daily lives of the people of Kinshasa through the investments it will make throughout the city," said Jean-Christophe Carret, the World Bank's country director.
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