This is an EPD of the M300 Metro Units for the Helsinki City Transport (HKL), a bidirectional electric train for Finnish track gauge (1,524 mm) consisting of four cars, three motor and one intermediate trailer car.
End cars have a temporary driver cab and all vehicles are eqipped with gangways that allows passengers to circulate freely between cars. The Helsinki Metro system terms for migration from a manual to fully automatic system have meant that the train have been designed to house a temporary cab with an off-centre driver post with all the functions required for safe operation with a driver. Once the Helsinki Metro system has been fully developed, the temporary cab will be dismantled. The train has been designed such that minimal changes can provide for a safe and comfortable service in the various existing grades of automation (GoA1, GoA3 and GoA4).
Taking account that the Helsinki Metro operates both outdoors and inside tunnels, the M300 vehicle has been designed for commercial operation in extreme temperatures and weather conditions ranging. The vehicle design has taken account environmental factors such as snow accumulation, ice formation, low track adhesion and sharp shifts in temperature in short spaces of time and heating box houses the brake resistors for enhanced energy efficiency and to condition the air inside the car.