I believe I had drafted what you have as CA 14 Truck as I-5 Truck, and a separate CA 14 Truck connecting CA 14 to I-5 Truck back when I first drafted usaca.
Whether the proper CA 14 Truck is included or not is up to you (I'd include it), but I do think I-5 Truck should stay (preferably as I-5 Truck) because of the exit to CA 14U.
Which, on a related note, I need to ask: CA 259 was removed because it's completely unsigned as such, correct? It's an odd reason, considering it has its own independent exit between its termini with I-215 and CA 210, and as a connector route, is on par with Delta Hwy (Lane CR 1740, according to OSM), which is included in the Oregon set. I think it's a viable candidate for inclusion, despite lack of signage, for that reason. That, and because I've clinched it of course. (I don't think entering it into the set as the northernmost segment of the San Bernardino Freeway is useful, as then you'd have to include the entire SBd Freeway, though that would finally cover out the segment between US 101 and I-5...)