there is one like this very near my house. it is some numbered county road but locals in the know call it "Thrill Hill"
the objective is to accelerate over the top of one hill thereby achieving a feeling of weightlessness.
as you continue your acceleration through the bottom of the hill the feeling of weightlessness is almost immediately followed by a feeling of positive G-Forces pulling you into your seat as you encounter the bottom of the hill.
it is a real stomach turner - hence the name "thrill hill"
an alternative name for it should probably be "Speed Trap Lane"