TMH says the vehicle has been designed without recesses and protrusions to achieve a streamlined and dynamic outline.

Door apertures will be increased from 100mm to 1600mm to speed up boarding. The interior features USB sockets, passenger Wi-Fi, an interactive metro map, infotainment screens, and smart glass, which allows video images to be shown in the windows.

The concept also features intelligent lighting which adjusts its luminosity and tone according to the time of day, a new ventilation system, and spaces for passengers with wheelchairs.

Coloured lights indicate the opening and closing of doors and CCTV cameras give the driver a clear view down the outside of the train.

The train will be equipped with asynchronous traction to improve energy efficiency as well as a remote diagnostics system.

TMH says the design takes into account experiences gained operating modern rolling stock on the St Petersburg metro.

If St Petersburg metro decides to order the train, production could be carried out locally by Oktyrbrsky Electric Car Plant (OEVRZ).