Rubuta ci gaba don wannan sakin layi - A 1915, Davidson da 'yan takara 30 masu daraja sun kori motar mota na Cadillacs takwas da aka gyara a cikin Glidden Tour daga Chicago zuwa Nunin a San Francisco
da kuma dawowa a tsakiyar babban fanfare da 'yan jarida a kan hanya. Gidan motar ya fara ne kusa da makarantar Highland Park inda Davidson yake a cikin Motar Bincike. Sun tashi a ranar 10 ga Yuni, 1915, kuma suna da niyyar wucewa ta Moline, Iowa City, Omaha, Denver, da Salt Lake City don isa San Francisco don baje kolin Panama-Pacific a ranar 14 ga Yuli, 1915.