The big issue I see here is that where I live, and I think in many more rural areas, federal infrastructure constitutes a significant portion of the total infra

The big issue I see here is that where I live, and I think in many more rural areas, federal infrastructure constitutes a significant portion of the total infrastructure. A generous portion of the major city streets, for example, are US highways, and flood control was almost entirely built federally (and maintenance must now be funded by the local flood control district). This no doubt varies by region, but the portion of infrastructure which is federally funded is not small.