Inclusion Criteria:  Referral to interventional pulmonology or ENT for endoscopic management of suspected benign tracheal stenosis. Significant tracheal stenosis defined by stenosis ≥ 50% of tracheal lumen assessed on chest CT or symptomatology warranting evaluation. Able to provide informed consent Age > 18  Exclusion Criteria:  Inability to provide informed consent. Pregnancy Known or suspected malignant central airway stenosis Patient has already been enrolled in this study.  Study subject has any disease or condition that interferes with safe completion of the study including:  Hypoxemia with need for supplemental oxygen ≥ 2L/min by nasal canula Recent pneumothorax in the previous 12 months Severe COPD (defined as a FEV1/FVC < 70% and FEV1 < 30% predicted) and/or severe persistent asthma. Hemodynamic instability with systolic blood pressure <90 mmHg or heart rate > 120 beats/min, unless deemed to be stable with these values by the attending physicians. Prior complications with SCT Contraindication to rigid bronchoscopy Significant tracheomalacia or alterations in cartilage integrity that would require stent placement or surgical referral as assessed by CT imaging. Greater then 1 BCAS intervention within 6 months before enrollment