When approaching a railroad grade crossing, stop between 15 and 50 feet from the nearest rail if:

• A driver is required to stop by an official traffic-control device or a traffic-control signal
• An approaching train is within about 1,500 feet of the crossing
• An approaching train is not visible and is quite far from the crossing
• Both A & B
  Explanation:

  "When approaching a railroad grade crossing, stop between 15 and 50 feet from the nearest rail if a driver is required to stop by an official traffic-control device or a traffic-control signal or an approaching train is within about 1,500 feet of the crossing."