Siemens SD-400 and SD-460

Both models have a common design, with frames built upon a B-2-B truck configuration mounted underneath a double-ended articulated body, which has a seating capacity for 72 people and room for an additional 106 standing passengers.

The dual-height door design was necessary on the Pittsburgh Light Rail system, which has both high-platform stations and traditional street-level streetcar stops.

On both types, electric current is received via an overhead catenary wire, which supplies 750 volts into the motors.

In 2023, Metro's board approved a $390.4 million contract with Siemens for as many 55 S200 battery-hybrid light rail vehicles to replace the oldest SD-400/460 cars.

[3][4] Other Siemens light rail vehicles for the American market: Other transit in the United States:

The interior of a Siemens SD-400 operated by Pittsburgh Regional Transit on the Pittsburgh Light Rail system. The door in the foreground is for level boarding at high-platform stations, and the door in the background has steps for boarding at street level.