If you must make an emergency stop on the side of a roadway and your vision is obscured, you should place the first warning signal ____ behind your vehicle.

When making an emergency stop on the side of any road, a warning signal should be placed 10 feet behind the vehicle. Depending on what the situation requires when your view is obstructed, you should also place a warning signal 100 feet in front of your vehicle and between 100 and 500 feet behind your vehicle.