First you have to get people out of the habit of being an active driver, and get to the point where their EV drives them to work. Once that becomes norm then taking a light rail transit is an easy sell. If you try to just force a new transit mode on motorheads they aren't going to accept it. Small environment savings and having large generating company's scrub pollution is better that leaving it up to individual car owners, and in places with Hydroelectic power it makes sense to ditch fossil fuels