That's an interesting question, I have been up there 3 times, drove up twice and I don't remember for sure but I think there was. Why do you ask? You can't take a trailer up. If you drive up in a vehicle, you have to drive back down as the train, (Tram) only sells round trip tickets and is full. The other way down is in an ambulance.
After thinking more about your question, there are a couple of pull overs or out looks, where you could turn around, so the answer to your question is, yes.
The road isn't that narrow you could turn around any where that cars can pass.