Possible to run client scripts as the server?

You are really over complicating your own wants here. You simply want a AI bus driver to be roaming the city on its own.

Several people now have told you that you are over complicating what you want and there is no reason to need to balance any load on any player as the load would be on the server it’s self.

Even if you wanted to make a script for a whole AI bus network, players on your server have no reason to need to “load balance” the script.

Unrelated: I can’t help but chuckle at your “FiveM is Dying” post in the middle of FiveM setting record breaking numbers.