SP Plus Corporation (SP+) announced its commencement of parking operations at Charles M. Schulz – Sonoma County Airport (STS) in Santa Rosa, California. SP+ now manages the three parking facilities located near the airport terminal, which includes an improvement plan to be rolled out over the next few months with a new pay-in-advance reservation system and 24-hour intercom assistance for parking customers. The plan also includes an emissions-free electric customer service vehicle.