In Seattle we paid $3.4 billion for a 1.7 mile tunnel (https://www.seattletimes.com/seattle-news/berthas-woes-grind...). Construction began in 2013 and it was supposed to open in 2015 but didn’t until 2019. It replaced a 4 lane elevated highway on the waterfront, which gave all drivers beautiful views, with an underground 4 lane highway that gave waterfront property owners a big boost in value, while relegating everyone else to views of subterranean walls. Somehow our local government saw this project as value for our money.