I don't think CA pays $1 billion/mi just to drill. The Purple Line Extension project in LA is forecast to cost $8.2 billion total and covers 9 miles (http://med

I don't think CA pays $1 billion/mi just to drill. The Purple Line Extension project in LA is forecast to cost $8.2 billion total and covers 9 miles (http://media.metro.net/projects_studies/westside/images/factsheet_ple_2018.pdf http://media.metro.net/projects_studies/westside/images/fact...). That's pretty close to $1b/mi but it's also all-inclusive and a subway underneath one of the densest, busiest streets in LA. And the cost of subway in Europe is much more than $40M/km. The Crossrail project in London is 118 km and 15 billion GBP (http://www.crossrail.co.uk/news/crossrail-in-numbers http://www.crossrail.co.uk/news/crossrail-in-numbers). That's about $280 million/mi. Definitely less than the LA project, but it's the same order of magnitude and much of their mileage is in suburban London.