I cant find any other street without the street number yet but I will keep trying to find one. I also tried switching between tts engine with the same app (vocalizerEX for android). The one I'm using right now (MeganTTS in the text-to-speech output android setting) pronounce 'drive' (just for 'Medical Center Dr') and 'street' correctly, but if I switch it to default VocalizerEX tts engine, it will pronounce 'doctor' (even for 'Medical Center Dr') and 'saint' (for 'St') . So it looks like the default tts engine is outdated. This is just my assumption. I might be wrong.