100.08 Duty to Disabled, Infirm, or Intoxicated Person, or to a Child When a carrier is aware that a passenger is [mentally or physically disabled] [feeble or infirm] [intoxicated] [a child traveling alone] so that the hazards of travel are increased as to [him] [her], it is the duty of the carrier to provide that additional care which the circumstances reasonably require. The failure of the defendant to fulfill this duty is negligence.