In 1962, South Africa built road sections from Kalahari sand instead of crushed rock; 55 years and 1.5 million truck-equivalent loads later, all remained in service without reported structural problems
Discover how South Africa's innovative use of Kalahari sand has led to the construction of durable roads, enduring more than 55 years under heavy traffic without failure. Learn about the experimental techniques that revolutionized road building in arid regions.
