He said before signing it that he won't do it b/c the infrastructure is not ready for it. But apparently he changed his mind. The only question is: where will the power come from which is needed to "Plug cars" into?

At this point he probably does not care. He is leaving soon and he wanted this to be his legacy, next to the high speed train. The left are legacy minded like Hussein. Never mind that legacy is pushing many people into poverty.