Cape Town - The R300 has been reopened after striking workers barricaded it with burning tyres earlier this afternoon.
City of Cape Town traffic services spokesperson Richard Coleman confirmed authorities were still on scene.
The road was closed at about 13:30 between the N2 and AZ Berman Drive.
Facebook users described the freeway as "chaotic", and traffic officials advised motorists to use alternative routes.
The reason for the protest was not immediately clear and authorities were unable to confirm who was leading the action.