If a transportation system crosses more than one jurisdiction than it doesn't really matter if some localities are fantastic at investing in their own infrastru

If a transportation system crosses more than one jurisdiction than it doesn't really matter if some localities are fantastic at investing in their own infrastructure. It is inherently a problem that can be solved optimally only at a different level. It might be possible to design a system such that metro areas are always a single jurisdiction, but given that such areas grow and shrink over time it wouldn't be easy. I don't think that "corruption of the system" is a cause in and of itself of the high cost of infrastructure construction or repair. Whether or not the Constitution would need to be changed, that's an implementation detail. First we need to figure out if diffusion of responsibility is actually a major problem (as I suggest), then get widespread agreement that that is the case, only then should we start worrying about what legal barters may or may not be in the way of mitigation strategies.