This is the third part in a series on ways to make money in the Third World. All anecdotes in this series are true. You can read the entire series here.
The "toll" road - In lots of third world countries there are only a few main "roads" that connect one region to another. This makes these roads extremely important, and since these nations are poor, the roads are often in terrible condition. If a mudslide or storm washes out the road (common in the tropics), it can create a major problem for the cities along that road. I've seen potato prices go up by a factor of 10 in just a few weeks when a storm washed out the only road in the region. Truckers loaded with potatoes and sugar cane were stopped for over six weeks waiting for a road to open. During that time the only food they had was their cargo. So the truck drivers stranded in the mudslide ate good while the city starved. Such is life in the third world.