As a comparison, the latest French high-speed track that opened in 2016 was built for 5 billion euros (5.4 billion dollars) for 400 km. The Californian track b

As a comparison, the latest French high-speed track that opened in 2016 was built for 5 billion euros (5.4 billion dollars) for 400 km. The Californian track being twice as long, how the heck did it end up costing ten (10!) times as much??