Gauteng's e-tolling system was described as an evil money-making scheme by people attending the third and final public consultation in Sunninghill, north of Johannesburg.
Angry motorists also warned that gantries would burn and roads would be blocked if government insisted on rolling out the controversial project.
More than 300 people attended Thursday evening’s session, which followed similar ones in Kempton Park and Pretoria.
The Department of Transport and the South African National Roads Agency Limited (Sanral) are hosting the meetings to discuss tariffs and exemptions.
As with the previous sessions, anger boiled over as people shouted and hurled insults at the officials facilitating the meeting.
“We say no! No to Nkandla, no to e-tolls - no, no,” one man said.
Another said, “This is a money-making scheme, it’s not there to repair roads.”
One man threatened that rolling out of e-tolls would cause violent protests, saying: “You’re going to have gantries burnt; you’re going to have stones on the highways.”
Another attendee said the project was “simply wrong”.
On Thursday, private security was brought in but stood back without intervening.
Government has received around 3,000 written submissions from the public.
It is also understood similar meetings which were due to be held in other provinces have been cancelled.
Meanwhile, a full High Court review of the project will take place later in November.
Revenue from tolls will help repay a multi-billion rand debt taken out by Sanral in 2007.