Brigadier Sabata Mokgwabone said the truck was torched on Tuesday during a protest related to unemployment.
He said road linking Sun City and Pretoria was barricaded with burning tyres, but has since been opened.
The Sonop road linking Bapong and Brits was also blocked.
African News Agency
* PROTEST ACTION: BAPONG R556 02/05/ 2017 16:30*— SACCW Rustenburg (@SaccwRustenburg) May 2, 2017
R556 Through Bapong towards Sun City from the N4: NO-GO because of Protest Action. pic.twitter.com/s5ueQVnQy2