 According to RVR, they would have featured bright and spacious interiors and would have been 20-30% more power-efficient than their predecessors.The new units were expected to be produced at a rate of 15-20 per year and would have resulted in a gradual phasing out of the Tatra tramcars.These plans were not fully exercised; instead, in 2008, Škoda built 20 three-section 15 T trams for Riga, the first of which entered service in spring 2010.