We learn the story of the TanZam Highway slowly, day by day. Clues present themselves to the observant traveler. Green markings sprayed hastily onto houses. Red Xs blotted onto each and every road sign. There's the Chinese face looking on from beneath a face mask as Tanzanian men hack away at the blackened earth. There's a careful consideration of the name, TanZam, and an answer right on the map, if one knows where to look.
All roads have purpose, and most purpose is conquest. Building a road consumes more than paint and bitumen.