Navigating Movie Clip Timelines
Put it Together
Pay close attention because this could get confusing.
First, click Insert > New Symbol (or CTRL+F8) and create a Movie Clip named vehicle_moving_mc
Now drag a copy of vehicle_mc from the Library and give it the Instance Name vehicle. Then move to the main stage (Scene 1), drag a copy of vehicle_moving_mc from the Library and give it the Instance Name vehicle_moving:
Test the project... this is the crazy mess I have right now: