1. The US has a large NIH attitude and is unwilling to adopt overseas experience or standards.
2. Somehow we have to move away from building infrastructure as stepwise huge mega projects. And start building infrastructure as an ongoing incremental and reliable program into perpetuity. E.g. instead of CAHSR designed largely as a dedicated rail system with huge up front capital costs the benefits of which can’t be felt until it is all spent, set up a state rail agency to consolidate and consistently fund incremental improvements to the rail system, with incremental ROW purchases and improvements that over time reach the really big HSR goals. Imagine for example CAHSRs capital budget of $80 billion but instead going to fund an agency for 30 years that can then hire engineers and project managers and allocate it to its projects that have the best ROI over 30 years.
That last one seems to primarily be a political challenge though. Nobody likes state run agencies and everyone loves defunding them.