d30 Feature is a little light compared to normal. As you'll see in the note below, there is much more to this as it will be part of the d30 Sandbox Companion.
I know this table references other tables, but it can also be used generically. The tables for RE1, RE2 and RE3 appear on the "Road Encounters" page at this link. I had intended to complete the tables for RE4, RE5 and RE6, but time got away from me (hope to have them next week.) And for now, you'll have to consider the NCN tables "lost in translation" (I'll explain later.)