An average example in the United States is about 112 pounds per square yard, per inch of pavement thickness.
ɐn ˈævɹɪdʒ ɛɡzˈæmpəl ɪnðə juːnˈaɪɾᵻd stˈeɪts ɪz ɐbˌaʊt wˈʌnhˈʌndɹɪd twˈɛlv pˈaʊndz pɜː skwˈɛɹ jˈɑːɹd, pɜːɹ ˈɪntʃ ʌv pˈeɪvmənt θˈɪknəs.