Cosatu's secretary-genetal, Zwelinzima Vavi says the federation's planned march for Wednesday is not about campaigning for the ANC's elective conference in Mangaung later this year.
He says the March 7 strike is against e-tolling and the banning of labour brokers.
Vavi says the e-tolling system is equivalent to the privatisation of roads.
Tolling comes into effect on April 30 on 185km of the N1, N3, N12 and R21 around Johannesburg and Tshwane.