10 Dec 2023 5:23 pm
2019 study.
“Over the past generation, the condition of the interstate highway network improved consistently, even as its extent increased modestly, and traffic about doubled.”
https://www.nber.org/system/files/chapt ... c14352.pdf
“Over the past generation, the condition of the interstate highway network improved consistently, even as its extent increased modestly, and traffic about doubled.”
https://www.nber.org/system/files/chapt ... c14352.pdf