I spend enough of my life pining for better public transit that it's hard to be sympathetic here. If you have such a "blank slate" and can noepay for better infrastructure, don't fuck it up like the US!
It only a blank slate on the surface.
What happens is there's huge corruption and incompetence in the local and central administration which means bad planning, huge cost overruns, refusing to use E.U. funds because those imply higher scrutiny, and bad execution.
Also corrupt officials who have inside information buy land that will be crossed by infrastructure then delay it with lawsuits and astronomical prices for the land that has to be expropriated.