ˈɪntɹɛst ɪn mˈoʊɾɚspˌoːɹt wʌz ɛksplˈoʊdɪŋ dˈʊɹɹɪŋ ðɪs pˈiəɹɪəd ænd baɪ nˈaɪntiːnhˈʌndɹɪd twˈɛnti nˈaɪn, æt lˈiːst twˈɛnti fˈoːɹ bˈoːɹd tɹˈæks hɐdbɪn bˈɪlt ɚɹˈaʊnd ðə kˈʌntɹi, ɔːlðˈoʊ baɪ nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi wˈʌn, twˈɛnti ʌvðə twˈɛnti fˈoːɹ hɐdbɪn ʃˈʌt dˌaʊn ɔːɹ ɐbˈændənd, ænd fɹʌm nˈaɪntiːnhˈʌndɹɪd θˈɜːɾi tˈuː ˌɔn ðɛɹwˌɜː nˈoʊmˌoːɹ tʃˈæmpiənʃˌɪplˈɛvəl ɹˈeɪsᵻz ɹˈʌn ˌɔn bˈoːɹdz.
Interest in motorsport was exploding during this period and by 1929, at least 24 board tracks had been built around the country, although by 1931, 20 of the 24 had been shut down or abandoned, and from 1932 on there were no more championship-level races run on boards.