The government gazette relating to e-tolling in Gauteng says that tariffs for motorists with e-tags will be set at 30 cents per kilometre, according to a report in the Star newspaper on Friday.
Standard rates for those without e-tags are more than double this amount.
Quoting the gazette, The Star said users without e-tags who pay their toll fees within 30 days will be given a 60 percent discount.
A monthly cap on heavy vehicles has also been included.
Cars and motorbikes are capped at a maximum of R550 a month, class B (small heavy vehicles) at R1750 and class C (large heavy vehicles) at R3500.
It is unclear when e-tolling will begin.
Government was expected to make an announcement on e-tolling later on Friday.
This week, Cabinet approved the gazetting of terms and conditions, including updated tariffs.
There would be a 30-day period for public comment. The government would then incorporate the comments and publish its final position after 14 days.
The 30-day period expires one day before the start of the judicial review of e-tolling on November 26.