Electric rail transit service between cities and towns that are fairly close to each other, specifically, 9-50 miles (15-80 kilometers). This mode usually operates on private rights-of-way that are longitudinally physically separated (by curbs, barriers, grade separation, etc.) from other traffic but that have grade crossings for other vehicles and pedestrians, including regular street intersections. Sections of line in cities may run along streets or median strips. (TRB)