One of the lessons is, you can build a major bridge in less than 3 years. If it takes 20 years it is a sign that the country is severely f-ed up.
Wasn’t the Empire State Building built in one year? Hoover Dam in 2 or 3 years? Course in those times the government actually encouraged Americans to dream and achieve.
This bridge was built in only a couple of years. I know, because I lived right next to it. The houses on the other side of the alley behind my house were removed to make room for the bridge. The area went from houses to working bridge in a couple of years.