From Onset Developer Wiki
Calls when a vehicle streams out of the streaming distance set in your server_config for a player.
The vehicle for the other player is streamed in.
The player that streams in for vehicle.
AddEvent("OnVehicleStreamOut", function(vehicle) AddPlayerChat("Vehicle ID " .. vehicle .. " has now streamed for you! There's now " .. #GetStreamedVehicles() .. " vehicles streamed for you!") end)