Interblox 73

Interblox 73 is the proposed designation of an Interblox Highway Corridor under development in Central Robloxia and Eastern Robloxia. It is planned to run from Bloxanada to the current south end of Eastern Robloxia State Route 73. The unnumbered Interstate was established by the Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users (SAFETEA-LU) legislation. The "Interblox 73" designation has not been officially accepted by Robloxian Association of State Highway and Transportation Officials (RASHTO) or the Robloxia Highway Administration (RHWA) but is being used by the Central Robloxia and Eastern Robloxia Departments of Transportation and others to identify the highway. It is unknown where the number came from. Portions of the planned route, including the Grapes Freeway and the Old RoCity Freeway, are already built to Interblox standards; the exact route has been finalized.