kieran1...there are bits and pieces of this info around that you will have to piece together. The geometry is up to the designer (or owner!), given a few constraints of curve radius relative to the number and size of karts.
Some other considerations:
1) Flatness/levelness of the track to mitigate low ground clearance on the karts
2) Cushioning side bumpers, capable of withstanding multiple direct impacts
3) Surface texture to create traction
4) Concrete pavement or asphalt pavement...either will work
5) Emergency access to karts/patrons in event of accident
6) Ease of maintenance
7) Quick/easy access to "garage" for maintenance of karts
8) Fire suppression or extinguishing capability at strategic points.
9) Stage area should allow free, safe movement of patrons. Directional/guidance rails are good for crowd control.
10) Karts should be commercial type, capable of little or no gasoline leakage when turned over, with appropriate protections for loose clothing, flailing arms, fingers, etc.
11) Remote shutdown (emergency stop) capable of stopping all karts at once and capable of stopping selective karts at the operator's direction. Shutdown console should be hand-held for operator's use and control at all times.
Several states in the US have criteria for Kart tracks. You'll usually find this under a "Bureau of Fairs", "Department of Consumer Services" or other such state government agency that controls such amusement devices. As an example, you may go to Florida's amusement ride/device inspection bureau to get some information. The website is
Once on this website, go to Rules and Regulations and then to Chapter 5F of the state statutes. This gives a lot of regulatory info on kart tracks and karts.
Good luck.
Ron