Road construction projects yield campaign contributions and worse. That’s why cheap blacktop roads that need major work every few years are preferred. Today’s concrete technology can make roads that hold up for several generations.
I learned to drive in the 70s on concrete roads built in the 1930s by the WPA and designed using slide rules.
And in 2009, I drove across a WPA built bridge while the Interstate bridges up and down stream were under water and then had to be inspected to see if the footings held up. Of course, as soon as they could line up funding the Georgia DOT started working to rip out the old bridge so they wouldn't be embarrassed again. The fact that they created a national park around the bridge did, of course, slow things down.