I've been becoming very acquainted with signals and the various dialects across the country, I'm particularly fond of NORAC and CSX speed signaling but a hypothetical situation has me puzzled. Here's the setup, a new commuter rail service is to begin operations and to keep traffic flowing, the agency has specified 80mph crossovers in 80mph (79) territory to thread passenger trains around freight trains without delay. Under NORAC or CSX, what would the setup likely be for the distant and home signals for a diverging movement over one of these high speed crossovers? I know the NEC uses flashing-green "cab speed" for this kind of thing, but what about a non-cab-signaled line? I could imagine some kind of odd hybrid route/speed signaling with maybe "approach diverging clear" followed by "diverging clear" allowing full-speed movement, but it still doesn't feel quite right.