Trolleys
In Milwaukee, WI the mayor is planning a trolley for the downtown are. It will cost millions to move transmission lines and other infrastructure as the trolley cannot run over the areas where these lines are present. Who would pay for it ? The consumers on their bills and taxpayers. How likely are people to ride this albatross in the Winter ? Not very lilkely. We have enough toys thank you. Carbon Neutral ? Hardly. Anything needing electricity is not carbon neutral
If it is such a good idea then someone in the private sector would fund it. That's why governments fund these sort of garbage projects that end up costing taxpayers maintenance costs and low ridership. Even in Europe rail ridership is declining and most people are driving their cars.
These ideas are not new. We don't need more pipe dreams.