If you are not sure you have enough overhead clearance, you should

• A. Proceed cautiously
• B. Find another route
• C. Ignore the clearance
• D. Turn on hazards and proceed

Answer: (B)

When you’re not sure you have enough overhead clearance, safety means you don’t press ahead into a potential obstacle. The best choice is to find another route where you know the clearance is sufficient. This avoids a possible collision with bridges, signs, or other structures and helps keep your vehicle and others safe.

Proceeding cautiously can still put you at risk if the space turns out to be too tight. Ignoring the clearance is dangerous and unacceptable. Turning on hazards and continuing does not affect the physical space or prevent a collision.