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The Opposition to Urban Tolling Alliance has filed its appeal against e-tolls in the Pretoria High Court.
Outa chairperson Musa Strachan says the application for leave to appeal was filed in court on Tuesday.
He says Outa members firmly believe that the grounds and merits of this appeal are very strong and that leaving the judgment unchallenged will set a significantly erroneous precedent.
The appeal follows a judgment on December 13 by the High Court in Pretoria which dismissed an application by Outa to have the electronic tolling of Gauteng's major roads scrapped.
Strachan says Outa maintains that procedural and objective fairness had not been applied, making the introduction of e-tolls unlawful.
He says the judgment also erroneously relied on a minority judgment from the Constitutional Court ruling and thereby misrepresented and ignored crucial aspects of Outa's case.