The Most Expensive Construction Projects Ever

The US Interstate Highway System has cost taxpayers an estimated $459 billion. The President most responsible for its creation is Dwight D. Eisenhower. His idea behind it was not just about transportation. Since it would HELP mobilize infantry in an emergency, he proposed the project as being crucial for national defense.The project was started in 1956. It involved creating new routes, and converting old ones to serve as “interstates.”