Quote:
Originally Posted by hipster duck
We could build a rail line that tops out at 200 km/h for $4B or we could build a rail line that tops out at 300 km/h for $40B. That 45 minutes-1 hour of savings on a Toronto-Montreal isn't really worth it.
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I dislike the "billions versus minutes" framing because it's actually a lot of time when you multiply the total trips by the lifetime of the infrastructure. Many rail lines have remained in operation for over 100 years.
If you pick some modest numbers like $10 value for saving 1 hour of trip, 5,000 trips per day, and 30 years of operation, that works out to around $500M. At $20 an hour, 50,000 trips a day and amortization period 50 years, it works out to $18B. The point is that when you do the multiplication, you can get big numbers. Easily numbers far beyond what is invested.
In general we don't invest enough in infrastructure, as judged by cost-benefit, and "sticker shock" has not kept up with inflation.