When making a U-turn, how close can you be to a railroad crossing?

Answer: C — 100 feet

When making a U-turn, it is important to be far enough away from a railroad crossing to ensure the safety of yourself and others. Option A, 25 feet, may seem like a reasonable distance, but it is actually too close and can increase the risk of a collision with an oncoming train. Option B, 50 feet, is still too close and does not allow for enough time to safely complete the U-turn. Option D, 150 feet, is too far away and may cause unnecessary delays in traffic. Option C, 100 feet, is the recommended distance for making a U-turn near a railroad crossing as it allows for enough time to turn safely while also maintaining a safe distance from the tracks.