(Updated with clarifications) Could a tesla coil be safely built, installed and operated on an active road vehicle which is driving a regular city street? Let's say we want the discharges to be 20-30cm long in the longest direction. Could that tesla coil be actively operating for long periods of time on that car while it is moving, or would this inevitably damage some parts of the car or immediate surroundings (like other cars or electric equipment around that) around it? If it could be switched on/off, then perhaps it would be enough to only make sure it doesn't damage the car itself, while turning it off when too close to other cars or objects.
If there is a safe way to operate it, does that way entail building some kind of electrical cage around the tesla coil? Or would that not help? Or is not even required? Would it need to be a bipolar TC since those don't require ground connection?
How would you even approach this question, what would be hypothetical damage to the car if it was not in fact safe? For the types of the damage that it could cause, is there a way to diagnose, monitor and prevent it? For example if the problem is RF frequency interference, is there a way to shield the electronics from it, or monitor it with some sensor to make sure it is within a certain range?
Several people have asked what the "intend application/usage case is". The usage is to use the tesla coil as a show, for coolness factor. (But are they really ever used for anything else at all? Maybe scientific experiments?) The regular operating environment would be normal city streets.