Question 85 of 180

What is one reason placard visibility rules require them to be placed on all four sides of a vehicle rather than just the back?

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Because rear-only placards are illegal to manufacture under federal placard design standards currently in place
So the vehicle looks more decorated and professional
So responders approaching from any direction, or drivers alongside the vehicle, can see what's being carried
Because it helps with aerodynamics at highway speed

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Correct answer to question 85 (Hazardous Materials): So responders approaching from any direction, or drivers alongside the vehicle, can see what's being carried

Why

An emergency can be approached from any direction, so placards on every side make sure the hazard is visible no matter which way responders or bystanders are coming from.

Updated: November 2026

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What is one reason placard visibility rules require them to be placed on all four sides of a vehicle rather than just the back?

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