I believe Nav N Go (maker of iGO/Primo/NextGen) uses a subset of LUA. My original mod was to change dictionary.voice file for an old voice running on MyWay. Then I checked Primo with the Joe Cool voice file (probably from Mike Hunt) had the LUA routines and after playing around with it, the "digit check" need to be remove in order for the routine not to intercept and change the output. The commenting out was my fixI like to use Samantha because it has TTSPro functionalities, so I'm porting the fix over to it. Who ever originally created the function format_road_number, was thinking to handle highway with naming of <digits> or <alpha><digits> or <alpha><alpha><digits>. US highways have format of <alpha><digits> like "I-75" (so having it not pronounced "Aye" 75 th is correct) or "US 101" (pronounced "U S one hundred one") However, I don't recall any highway having just <digits>, only streets. So commenting it out should be correct.
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