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What is something roads can be made out of
asphalt, cement, sand and/or rock
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What is the strongest shape used in bridges
a triangle
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What is the difference between paved roads and unpaved roads
the non paved road is straight up dirt
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What is a main road used for interstate travel
highway
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What are two roads meeting called
intersection
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what is the importance of a road
they allow for safe driving and an even driving surface
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