The M8s have new roomier, high-back seats with individual headrests and curved arm rests for more comfort. For improved safety, especially in the vestibules, the cars have larger windows and better lighting. An additional safety feature is the installation of intercom systems that customers can use to contact the train crew in case of emergency. Other features included curved luggage racks, coat hooks, electrical outlets to charge personal devices, and LED displays that show that next stop and automated announcements. The cars also have external public address speakers, and electronic destination signs. Higher reliability is possible with single leaf doors, which also lessen the susceptibility to snow intrusion. Also, the M8s have sealed alternating current motors that are less susceptible to weather.