ɪn pɚtˈɪkjʊlɚ, tˈɛmpɹɪtʃɚz ɡɹˈeɪɾɚ ðɐn wˈʌnhˈʌndɹɪd nˈaɪnti nˈaɪn dᵻɡɹˈiːz sˈiː θɹˈiːhˈʌndɹɪd nˈaɪnti dᵻɡɹˈiːz ˈɛf, wɜː ʃˈoʊn tə pɹədˈuːs ɐ ɡɹˈeɪɾɚɹ ɛkspˈoʊʒɚ ɹˈɪsk ðɐn wɛn bɪtˈuːmɛn wʌz hˈiːɾᵻd tə lˈoʊɚ tˈɛmpɹɪtʃɚz, sˈʌtʃ ɐz ðoʊz tˈɪpɪkli jˈuːzd ɪn ˈæsfɔlt pˈeɪvmənt mˈɪks pɹədˈʌkʃən ænd plˈeɪsmənt.
In particular, temperatures greater than 199 °C (390 °F), were shown to produce a greater exposure risk than when bitumen was heated to lower temperatures, such as those typically used in asphalt pavement mix production and placement.