Answer:
When you are inside me you will be encouraged to slam other cars.
I tremble at each breath of air, and yet can heaviest burdens bear. What am I?
What is that you will break even when you name it?
When it comes to me you go on red and stop on green.
I think you live beneath a roof that is upheld by me; I think you seldom walk abroad but my fair form you see; I close you in on every side you very dwelling pave and probably I'll go with you At last into the grave.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.