Complex sentence: Like most suspended system it suffered from the problem of difficult switching arrangements; since the car rode on a rail, switching from one path to another required the rail to be moved, a slow process that limited the possible headways.
Split into simpler sentences: Like most suspended systems, it suffered from the problem of difficult switching arrangements. Since the car rode on a rail, switching from one path to another required the rail to be moved; a slow process that limited the possible headways.