"Auto Train" operates on the same route it and its predecessor have always used, with a majority of the route owned by CSX Transportation and 16 miles of track being owned by SunRail. The trains are known by their route numbers (53 southbound and 52 northbound) internally by Amtrak. When communicating on the CSX road channels, they are known by their CSX designations: P053xx and P052xx, where xx is the 2-digit date at which the train departed its origin station. For example, a southbound train that departed on the 23rd of the month would be known as CSX P05323 on the road channels. This allows for unique identification in the event that two trains on the same route are operating simultaneously.