Stablize motion

I have a clip where i have 3 cars and i need to stabilize the motion 30 seconds long.
as the clip moves on my first tracker, it is not able to lock the entire time because the car moves off the screen for good at about 10 seconds
i need to use my 2nd tracker on car 2 and
3rd tracker on car 3

how do i make my first tracker turn off at 10 seconds so at second 8 i can pick up tracker 2 and then turn off my tracker 2 turn off at second 20 so i can pick up tracker 3 at second 15 threw to second 30.

my final clip is 30 seconds long
but not each car is on screen the entire time.

Any help?

Thanks

Hmm... my guess is you'll need to add several different instances of the behaviors, one for each tracker? Adjust where they are in the timeline (you can even do this in the mini timeline, but I'd suggest using the main timeline...)