Train: electric, inside, train standing at the platform, doors opening (beep), platform sounds: a buzz of voices, suitcases rattling, doors closing (beep)

Train: electric, inside, train standing at the platform, door closing (warning beep), train starting to move, accelerating, riding, braking, stopping, standing at the platform (doors closed)

Train: electric, inside, train standing at the station (toot), train starting to move, manoeuvring, slow riding, braking, coming to a full stop (doors closed)