Drive as as fast as you can or give up and park.
I am there all the way. I'm a smooth one and dark.
I was formed in a blaze like the fires of hell.
I am oft underfoot. Overhead, though, as well.
Say my alternate name, I took gents in my jaws,
But the name I have here tells a snake it must pause.
The answer is a single English word. Please explain all clues and the title.