pɹˈaɪɚ tə ðə hˈaɪweɪ dˈaʊnloʊdɪŋz ʌv nˈaɪntiːnhˈʌndɹɪd nˈaɪnti sˈɛvən ænd nˈaɪntiːnhˈʌndɹɪd nˈaɪnti ˈeɪt, hˈaɪweɪ twˈɛlv wʌz ˈɔːlsoʊ nˌɑːt ɹˈaʊɾᵻd kəŋkˈɜːɹəntli ɐlˈɔŋ hˈaɪweɪ fˈoːɹhˈʌndɹɪd bᵻtwˌiːn kˈoʊldwɔːɾɚ ænd wˈɔːbəʃˌiːn, bˌʌt ɪnstˈɛd ɹˈæn æz ɐ sˈɪŋɡəl ɹˈoʊdweɪ, pˈæɹəlˌɛl tuː, ænd kɹˈɔsɪŋ, ðə fˈoːɹhˈʌndɹɪd.
Prior to the highway downloadings of 1997 and 1998, Highway 12 was also not routed concurrently along Highway 400 between Coldwater and Waubaushene, but instead ran as a single roadway, parallel to, and crossing, the 400.