Hopefully this time the project will manage to stay on the rails. The new agreement already has $100 million, and hopes to start construction September of next year. No word on cost, but the Verge reports that an earlier version of the project estimated costs at $6.3 billion. Quartz reports that number as more like $12.7 billion, and cites sources that think the project could be complete in 3 years. As for cost to consumers? They can expect to pay about $89 a ticket for the trip.