The reason the one I-5 Truck is on the site, is because it's a completely separate highway from the mainline I-5, and has it's own interchanges.
The others are part of an interchange, which in our books would count them as a 1PPI (1 point per interchange), and thus, not get a separate route file. As for the I-5/405 one, you could just consider those C/D lanes, kinda like ON-401 in Toronto, and thus, stay as part of the main route.