JOHANNESBURG, Gauteng - Sanral has rejected claims by the Opposition to Urban Tolling Alliance (Outa) that it was fabricating e-tag sales figures. The SA National Roads Agency Limited said in a statement on Thursday: "The e-tag sales figures we released are accurate, As a state-owned entity, everything we do is subject to audit processes by both the Auditor-General and our external auditors. We have no reason to 'fabricate' these figures as Outa alleges."Outa chairman Wayne Duvenage said on Wednesday (Dec 12) research showed that only 15% of freeway users were tagged. Earlier that day, Sanral's spokesman Vusi Mona said: "890 388 VLN/e-tags have been committed."NON-FREEWAY FIGUREOuta's research showed, of a sample of 2098 cars which used the freeway, 317 had an e-tag- about 15%. Of a sample of 2236 cars which did not use the freeways, 212 had an e-tag - about 9.5%.Duvenage surmised that, as about a third of cars in Gauteng did not use the freeway, it was expected the non-freeway figure would be lower.Applying the sample to the total number of cars which use Gauteng's freeways each month - about around 2.3-million - Outa believed the number of e-tags sold was only around 350 000. Duvenhage said:"E-tags are easy to see, especially at traffic lights, on freeway ramps and in shopping-centre car parks. This Christmas there is a new game for your kids while travelling around Gauteng -- spot the e-tag."Outa called on Sanral to come clean and provide the actual e-tag count passing under the toll gantries but the roads agency countered by saying it would not attach too much value to Outa's research unless its sources of the information were known and sound."We don't know what equipment has been used, with which technical specifications and standards it complies or where it has been installed," it said.The e-tolling of Gauteng highways came into effect on Dec 3,2013..