De Doorns - About 500 farm workers protested on the N1 highway at De Doorns on Monday morning, Western Cape police said.
Lieutenant-Coonlel Andrè Traut said the workers were locked in a wage dispute.
The highway between Touwriver and De Doorns was closed as a precautionary measure, with traffic diverted through Ceres.
No arrests were made and police were monitoring the situation. - Sapa