Building blocs and removing hurdles by Karen Hasse Somewhere near an African frontier, a heavily laden truck is wedged in a long train of other lorries. Its driver has turned off the engine and snoozes in the cab. He and other motorists have been waiting for hours, sometimes days, while their goods bake under the hot sun. Crossing an African border can be tedious, lengthy and expensive. Often, a full set of procedures on either side of the border results in delays, making cross-border trade difficult and costly. “In Southern Africa, a truck serving supermarkets across a border may need…