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New Mexico Class D Written Test Practice
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Passing target: 70% (21/30)
Warning, Construction & Information SignsStandalone practice
You are driving on a rural highway and see this yellow diamond sign. What does it warn you about?

Correct answer: A steep downgrade is ahead, where vehicles can build up speed.
Why
The hill sign warns of a steep downgrade where vehicles can quickly build up speed. Slow down before the grade and check your mirrors often on the way down, because vehicles behind you, especially large trucks and buses, may be going too fast. Keep enough space ahead so you do not need to brake hard on the hill.
Verified against New Mexico Driver Manual · Warning signs · p. 8, 20
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