In the 1990s, the government of Ethiopia knew that a major expansion of the road network was a sine qua non for its development goals―namely, (a) advance the private sector; (b) upgrade and expand essential infrastructure; and (c) conserve the environment.
and this is no joke. Some time ago, I travelled to rural Nepal to supervise joint DFID/World Bank work in improving access to remote communities. To reach the first village, Dailekh, we took a morning flight from Kathmandu and then drove for many hours. The further we travelled, the more uneven and less engineered the roads became, until the last ten miles to our destination were mere mud tracks. Night fell, the roads grew dark, and rain began to fall.