If there are no traffic lights or attendance stop for a drawbridge, how far should you stop from the drawbridge?

Answer: B — 50 feet

When approaching a drawbridge that does not have traffic lights or an attendant to direct traffic, it is essential to stop at a safe distance to ensure the safety of both yourself and others. The regulation specifies that you should stop at least 50 feet from the drawbridge. Stopping 50 feet away allows sufficient distance to react to any potential changes, such as warning signals or bridge operation. This distance is designed to provide a safe buffer, allowing enough time to assess the situation before proceeding. It also protects the safety of pedestrians or cyclists who may be on or near the bridge as it opens or closes. This is why the choice indicating 50 feet is the correct answer; it follows established safety protocols that prioritize caution in potentially hazardous scenarios like drawbridge crossings.