So its a system that has been around for quite some time. But I am not up to speed with the real world limitations.
Could a APRS tracking unit be put in each car for an event and then monitored by organizers?
(from my understanding the signals from each car would bounce off the every other car (beacon) in range until it gets to a internet connected station.)
How many radios transmitting before everything gets plugged up with traffic? (could you have 40 or 50 radios?)
As long as it is not used for commercial purposes its legal? (as in the organizers of the event being non-profit. CARS is non-profit but RA is for profit)
How often can the radios be setup to transmit their position?