I'd argue that Avalon Blvd. south of Alondra Blvd. & north of Carson St. should remain a primary road based on the presence of three traffic lanes in each direction (six total) in that section; I think the speed limit in most of this section is 40 mph as well. Other sections of Avalon Blvd. outside the aforementioned section could be either primary or secondary. Also, what parallel road are you talking about--San Pedro St.?