3 years, 1 billion dollars, 63 lane miles of concrete and asphalt paving, 29 new bridges and 22 miles of carpool lanes. That was Project Neon, in Las Vegas.

that doesn't mean that traffic around Vegas isn't still stuck with plenty of other make work - keep busy projects for the DOT... https://www.reviewjournal.com/news/news-columns/road-warrior/project-neon-ends-but-more-road-projects-coming-to-las-vegas-1824419/

https://www.equipmentworld.com/most-expensive-nev-public-works-project-las-vegas-project-neon-nearly-finished/
http://ndotprojectneon.com/learn/overview/