The Expert will be specific knowledgeable people at the Department of Transport, Arrive Alive Communications, the Road Traffic Management Corporation or others who might have the expertise to answer the question.
The Road Traffic Act, Act 29 of 1989 – Section 11 (Powers and duties of traffic officer) paragraph (d)
The Act empowers the officer to order the vehicle (……. to proceed to a massmeter or mass measuring device ……)
The procedure would be: stop the vehicle and if in doubt order the vehicle to a weighbridge or escort the vehicle to a weighbridge. The actual method implemented would be decided upon by the authority concerned.