CA-99 Interstate corridor? (From Bakersfield to Stockton if not Sacramento)

[Rothman]

Changing all the signs would require spending money, and wouldn't be solving any problems.  In fact it would create confusion.  By all means continue the functional upgrades.  But changing the number is a makework project at best.  (Wooo!  We're drivin' on an Interstate now! said no one ever.)

If I were CalTrans, I'd want as much 90% federal reimbursement as I could get a hold of.

I was under the impression that the 90% match days were over.

Your impression was quite incorrect.

https://www.fhwa.dot.gov/infrastructure-investment-and-jobs-act/fedshare_fact_sheet.cfm

What happened was going back to MAP-21, Interstate specific core federal programs really ceased to exist.  So, the 90% is not extra apportionment.  Interstate projects now compete with every other federal-aid project out there directly (or at least they have for the last 12 years or so).