The modernization and repair of trams 
Tramway K3R-N
Redesign of original vehicle K2 is done by a general overhaul of underframes and frames and between two end segments, a newly made middle low-floor segment is installed.
There is new TV Progress DC traction equipment from Cegelec Company, CAN busbar is used in control circuits. The vehicle has a new interior of passengers’ saloon, new driver’s cabin with air-conditiong. The middle segment is equipped with an access platform, which is controlled electrically.
