1001 to 1102: UG1 Leftover, Track ID File doesn't exist in game files.
2000: Car Showrooms/Garage/Out of Events, doesn't exist in-game files and Track List
3001: HP2 Leftover, Track ID File doesn't exist in game files.
4200: Drag Prototype
4300: Drift Prototype
4400: Ghost City Prototype, Organic Drags, Drag races for ghost city.
4500: Unknown existience.
4600: Street-X Prototype Track.
4700: URL/Dyno Tune/SW Circuit/Dyno Test Runs/Airport Prototype
4800: Unfinished Nascar Map / Completely unknown
4900: Unknown
200,000 and between 900,000: Event Handler / Unknown
65987: This shows as selected Track ID, unknown.
UPDATE: 4202 and 4203 are Bayview Bradge Prototypes, these 2 races have longer finish line, you cannot reach, because the road is cutted in final version, in PS2 Demo Beta, it was longer.
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