If a railroad crossing lacks lights or gates and only has a crossbuck, should you still yield the right-of-way to a train?

• Yes, always yield to the train
  Explanation:

  "Vehicles must always yield to a train even when the crossing only has a crossbuck and no lights or gates."
• No, proceed without yielding
• Yes, but only if the train is close
• No, yield only if lights or gates are present