Back to the OP: I was instructed to "Exit right on Exit to SR 95" this morning. Ramp from a freeway to a minor highway. Pronounced "State Route Ninety Five" in case anyone cares.
I care! That's why I wonder about things like US Hwy 25 versus US-25, and State Route 543 versus SR-543. Is it necessary to spell out "State Route" when "SR" communicates the same information? ("SR" fits much better in my client and TTS knows what it means.) Anyway, I've been compiling a list of how TTS interprets the text. The list to date follows...in case anyone cares.
There's others, obviously. I just haven't tested all of them, yet.
Brg Bridge not sure if TTS is trying to pronounce the abbr or understands this is "bridge"
CR County Road
FM ef em farm-to-market road designation common in Texas, mostly
Jr. Junior the period after the 'r' matters
RR Rural Road
SR State Route
Tunl Tunnel not sure if TTS is trying to pronounce the abbr or understands this is "tunnel"