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Iowa Class C Knowledge Test Practice
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Passing target: 20/25 correct (TLA practice target)
Warning, Construction & Information SignsStandalone practice
You see a yellow warning sign with vertical arrows and a height measurement. You are driving a tall vehicle. What should you do?
Correct answer: Check the posted clearance against your vehicle's full height.
Why
A low-clearance sign gives the available vertical space at an overhead obstruction. Include roof loads or equipment when checking vehicle height. If safe clearance is uncertain or inadequate, use another lawful route rather than test the opening.
Verified against Iowa Driver's License Manual and current primary rules · Checking overhead clearance
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