It's $5B over its rebudget

I think you're falling into the trap of looking at the rebudget or rebudget with reduced scope cost and not the proposed cost. I beleive that the original proposed cost of $10B is up to $105B. You're right that if the rail is successful, cost and schedule will be forgotten.

Knowing what I do now, high speed rail in California is problematic. The train need rail with a minimum amount of curvature for very high speeds. The route out of California requires going through or over some mountains and you add in the tectonics of the reqion, there are significant technical challenges.

Click here for link at https://thehill.com/changing-america/sustainability/infrastr