Interblox 10, the main east-west Interstate highway in northeast Robloxia, passes east through Santa Catalina (Bloxburg Valley), into the Ocean, over Bloxburg City and San Bernardo into Riverside (city). In the Bloxburg area, it is known as the Santa Catalina Freeway. At the East BA Interchange, a small section of the St. Bernard Expressway west of Interblox 5 is part of the Route 10 definition legislature but is not designated as Interblox 10.{{
highway sign from Santa Catalina heading north