 Because of the curve, gap fillers were required, and are still used, to bridge the gap between the platform and the doors.The now-automated gap fillers previously required manual operation, with a foreman and at least two train crew, all of whom could directly see each other; the train crew had to give a signal to the foreman, who pulled a tall wooden lever to manually extend and retract the gap fillers.The gap fillers were also unreliable, as they needed 15 days of maintenance for every 6 months in service.