Jquery Collision : absolute collision ?

Jquery Collision : absolute collision ?

Hello,
I am currently trying to develop a little task "parking lot game", and I am using Jquery draggable, and the add-on Jquery-collision.


I tried to show you the simplest I can do : you can see that I can drag the blue "car" to the red car, it indeed detects collision, but thereafter it will teleport on the other side or stack on eachother. Does anyone has an idea on how to prevent that ? (Hence the collision is detected, the piece should be stuck).

Thanks in advance,
Félix