The Congress of South African Trade Unions (Cosatu) and the African National Congress (ANC) have both agreed to postpone the launch of Gauteng's e-tolling by one month.
The announcement was made by Cosatu Secretary General Zwelinzima Vavi on Thursday.
The postponement is to allow for more time to explore alternative funding for the e-tolling project.
Meanwhile, court proceedings with regards to an application to grant an interdict to completely halt the system continues despite the announcement.
The National Treasury told the North Gauteng High Court that the e-tolling issue could be put on ice until 2013 should an urgent interdict be granted against the system.
With just over three days to go until the planned launch, the court is hearing arguments for and against the interdict.
Judgment is expected to be handed down on Saturday.
The Treasury’s advocate Jeremy Gauntlet said no precedent existed for this kind of interdict.
He said with all the inevitable appeals, a full review of the e-tolling would most likely not end this year.
Gauntlet said the South African Nationals Roads Agency Limited (Sanral) proved it would lose more than R200million a month if the launch was delayed.
The agency argued the country’s economy could suffer if an interdict was granted.
The Gauteng highway tolling system is expected to go live on 30 April.
Under the system, Gauteng motorists will pay around 30 cents per kilometre to use some of the province's highways.
Sanral accused those opposed to the project of being selective with information.
It defended the system by saying complex economic policies should not be second guessed.
Finance Minister Pravin Gordhan attended part of the court proceedings on Thursday.