Busa questions Sanral's e-toll figures
Busa criticised Sanral's figures which it claims it's collecting through the e-tolling system.
The review panel, which was appointed by Gauteng Premier David Makhura, wrapped up its first week of consultations.
The panel has heard input from business and labour over the past three days with only one affected party so far in full support of the multi-billion rand project.
The roads agency claims more than 80 percent of e-toll users pay less than a R100 a month.
But Busa suspects Sanral is hiding the real figures.
The review panel has been asked to assess the socio-economic impact of electronic tolling on some of the province's highways.
The business unit's Kgatlaki Ngoasheng has criticised Sanral's figures which the roads association claims it is collecting through the e-tolling system.
He says costs will escalate while the public will not be informed.
"There tends to be hidden costs especially under the item 'others' which is disguised to hide other things."
It says the country will need an extra R70 billion rand to service the debt if the e-tolling system remains in place.
Ngoasheng told the review panel that a fuel levy is the best alternative method to fund roads and can enforce accountability.