As it is still difficult to understand what you are trying to achieve, let me explain what is happening in your current capx.
First, on collision with Yellow figures, you destroy them and modify some Instance Variables values in the car.
When the car hits the wall, it creates a Yellow figure at some point of the car. But at the same time, it considers it is colliding with the Yellow figure, and so it destroys it and modifies the instance variable values, like it did when running in Yellow figures at first.
In regards to your previous messages, it seems you are willing to have some "max human capacity" in the vehicle.
It seems also that on collision with the wall, you want all your figures to get out of the car.
And you are trying to make it so that one of the figures in the car is always a red figure.
It still is very vague. And it requires to modify entirely your project.
Moreover, a lot of the implementation depends on exactly what you are trying to make, which we have issues understanding.
I understand English is not your main language, but I'm afraid we can't help further if you don't provide more explicit details.
Here is a way to have yellow figures getting in and out of the car :
Please explain in further detail what the red figure is supposed to represent, what you want it to do exactly, and if you expect having more than one of it out of the vehicle during the game.