The promise is included within the link below. The question that I must ask is, when was the last time that any United States high speed rail travel time hit within 200% of it's promised travel time? Also, when was the last time that a high speed rail line within the US achieved a construction cost within 300% of its promised cost.
The answer is never, and never. These things sound wonderful, they sound fast and sound cheap, yet every time they turn out to be awkward, slow and expensive. Frankly, people pass them up to fly, and money is wasted..........again and again and again.
https://www.yahoo.com/news/high-speed-rail-line-las-145401755.html