The Inter-Ministerial Committee on the Gauteng Freeway Improvement Project (GFIP) will meet Cosatu on Friday as part of stakeholder consultations on the project.
The committee, which is chaired by Deputy President Kgalema Motlanthe, met several businesses and organisations on Thursday.
Business Unity SA, the Southern African Vehicle Rental and Leasing Association, the Opposition to Urban Tolling Alliance, the Road Freight Association and religious leaders discussed several alternative funding models for the project.
Motlanthe's spokesman Thabo Masebe said the stakeholders were given explanations on the operational and administrative costs of the e-toll system.
"Stakeholders argued strongly for alternative funding models for the GFIP, including [increasing the] fuel levy," he said.
"Government is aware of the concerns of stakeholders and is committed to consider all suggestions in deciding on a way forward."
On March 7, the Congress of SA Trade Unions (Cosatu) held a nationwide strike against e-tolling and labour broking, and on April 26 an agreement was reached in a meeting between the African National Congress and the union to delay the implementation of the project by a month.
On April 28 the High Court in Pretoria granted an urgent interdict, brought by Outa, to stop the launch of the system, so that a full court review could be carried out to decide if it should be scrapped.