A lawsuit filed by Austria against German plans to introduce tolls for private cars on the country’s motorway network has found an ally. The Netherlands announced it will join the lawsuit.

Announcing the decision, Dutch Transport Minister Cora van Nieuwenhuizen said the plan is discriminatory against non-German drivers.

“In other words, only the drivers of private cars with a foreign number plate will pay the toll in Germany,” she said.

As reported by Dutch News online, transport ministry figures show that the measure will cost Dutch drivers between €60m and €100m a year and will have a strong impact on people living in the border areas. Companies in the border areas will also be affected.

The Dutch cabinet wants the European Court of Justice to give its views and has made a formal application to join up with the Austrian case.

No ruling is expected before 2019 when the German toll plans will also come into force.

As reported by The Local, the German parliament passed legislation establishing the toll in 2015 but the European Commission said the plans did discriminate against non-German drivers from other EU member states. Germany then agreed to make changes to those plans and they have now been approved by both German houses of parliament.