Relationships between structural and performance variables were studied in 16 public transit organizations in California. Data was collected from archives, personal interviews, management surveys and on-site observations. Statistical analyses focus upon associations between structural variables and organizational efficiency, effective ness, and employee withdrawal. Organization size, span of control, centralization, and length of managerial tenure were all associated with higher levels of organizational performance. Specialization and formali zation were found to be associated with lower levels of performance on certain efficiency and effectiveness indicators.