Regional travel and local travel should be put in different categories.
This principle is born out in the cost. Louisiana spent 325 million extending I-49 to LA-1 completed in 2014, according to the Shreveport Times. This is a 30 mile stretch of highway.
On the other hand, the 2.9 mile stretch through Shreveport would cost more over $500 million.
ASCE, the national coalition for civil engineers, recognizes that infrastructure needs have to decrease relative to the amount of investment. ASCE calls this the "Grand Challenge". Along with raising money for infrastructure spending, ASCE wants to reduce the life-cycle cost of infrastructure by 50%.