In May 2017 üstra used its second contractual option for a third delivery lot for a further 46 TW3000 light rail vehicles and thus HeiterBlick was contracted to manufacture and assembly these vehicles. The current order volume totals 146 vehicles which are scheduled to be put into service by the üstra Hannoversche Verkehrsbetriebe AG until the beginning of 2020.
In March 2018 üstra announced its intention to expand its vehicle fleet by another 7 vehicles. Production is planned throughout, so that these vehicles are also scheduled for delivery in 2020.
At present the vehicles of the series II (or the 1st option) are manufactured in Leipzig and 73 light rail vehicles accepted by üstra are in regular passenger service in Hanover (as of March 2018).