That sort of specific project funding would require Congress to lift it's self-imposed ban on earmarks. I'm not convinced that'll happen.
Earmarks can and have been disguised within legislative texts, particularly within budget reconciliation bills. Adding HPC's to the existing compendium could be considered to be such an "earmark", as each one of these affects a particular area that may or may not correspond with a particular congressional district (or, if initiated within the Senate, an entire state). Even with hyper-partisanship being the current norm, some in Congress still manage to steer projects and funding to their districts or states (the NC delegation seems to be particularly adept at this as regards highway corridors, on par with the TX group). The trick is to
not combine corridor designation with immediate funding requests -- just put the corridor in the nationwide list and slide it into the queue for funding down the line. If anything, the process is akin to sleight-of hand; somehow a locally-beneficial project is framed as a matter of national interest. Whether or not they function as such in reality, Interstate additions via the HPC designation process seem to largely pass the "smell test" within Congressional circles when framed as extensions of the overall national system.