Forget an elevator, how about a space ramp?

Not on the earth, obviously; more like the moon, even more feasibly, Io. Just get a really fast car(I know, cars don't work in space, let's just say it has an oxygen tank, or actually since acceleration isn't that big of a problem, just use an electric car), and a long track with a tall(very tall) ramp at the end. Now, let's say you were going orbital velocity when you left the ramp...here's where I'm wondering...would you hit the ramp when you come back around(ignore rotation effects)? I've always had difficulty understanding orbits.
liftservice