You could combine the 2. Electrify well used lines and use the battery for the last (150) mile(s). It makes more sense with trolley buses where the urban cores

You could combine the 2. Electrify well used lines and use the battery for the last (150) mile(s). It makes more sense with trolley buses where the urban cores are busier than outlying parts, could work for trains too though to a lesser extent.