One of the fastest growing economies in Africa, Ethiopia, has an ambitious plan to cut a green, sustainable path to becoming a middle-income country by 2025. Along the way, the country faces growing urban migration and rising demand for food?challenges that are linked by, and depend on, roads for access, supply and mobility. In 1997, the total road network in Ethiopia was 26,550 kilometers. By 2014 it reached 99,522 km. For the country to reach its ambitious growth targets it?s aiming to double this to over 200,000 km by 2020. New roads in sub-Saharan Africa often change the landscape, bringing dust, flooding and erosion. But new roads in Ethiopia and across sub-Saharan Africa often change...