When approaching an underpass or low clearance, what should you verify?

When approaching an underpass or low clearance, what should you verify?

• A. Check to see if the underpass height is marked
• B. Check the road surface for potholes
• C. Check the weather forecast
• D. Turn on additional lights

Answer: (A)

When approaching an underpass or low clearance, the key action is to verify the posted clearance height. That sign shows how tall the passage is and is the only reliable measure of whether your vehicle can safely pass. Before proceeding, compare the vehicle’s total height—including any attachments, racks, or equipment on top and the water tank configuration you’re using—to the posted clearance. Even a small miscalculation can result in a crash, damage to the vehicle, or getting stuck, which is especially risky in a mobile water supply operation where height can vary with load. Other factors like road surface conditions, weather forecasts, or lighting are important in general driving, but they don’t address the immediate danger of a low clearance. If the height isn’t clearly marked or there’s any doubt about whether you’ll clear it, do not proceed and seek an alternate route or guidance.

When approaching an underpass or low clearance, the key action is to verify the posted clearance height. That sign shows how tall the passage is and is the only reliable measure of whether your vehicle can safely pass. Before proceeding, compare the vehicle’s total height—including any attachments, racks, or equipment on top and the water tank configuration you’re using—to the posted clearance. Even a small miscalculation can result in a crash, damage to the vehicle, or getting stuck, which is especially risky in a mobile water supply operation where height can vary with load.

Other factors like road surface conditions, weather forecasts, or lighting are important in general driving, but they don’t address the immediate danger of a low clearance. If the height isn’t clearly marked or there’s any doubt about whether you’ll clear it, do not proceed and seek an alternate route or guidance.