The South African National Roads Agency Limited (Sanral) announced last month the appointment of four small, medium-sized and microenterprises (SMMEs) in the Eastern Cape to manufacture interlocking concrete blocks, known as dolosse. The roads agency, which has a responsibility to protect its asset against destructive wave action, is manufacturing the dolosse used to protect the sea-facing N2 and parallel railway line, adjacent to the Settlers interchange in Port Elizabeth, from destructive waves.
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