What are the lamp distance requirements for an emergency on a vision obscured road?

• A. 50 feet behind and 200 feet in front
• B. 100 feet behind and 500 feet in front
• C. 10 feet behind and 100 feet in front
• D. 200 feet behind and 300 feet in front

Answer: (C)

On a vision-obscured road, you want warning that reaches drivers in both directions clearly and promptly. Keeping the warning lamps about 10 feet behind the emergency vehicle places the alert right where trailing traffic will notice it as soon as visibility is poor, helping them slow down or stop in time. Setting the front warning about 100 feet ahead gives approaching drivers enough distance to react before reaching the scene, which is crucial when sight lines are limited. This combination provides immediate rear visibility for vehicles behind and a sufficient forward warning for those coming from ahead, reducing the risk of a collision in low-visibility conditions.