Drive below the posted speed limit when:
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Others drive below the speed limit.
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Entering a highway where there are other cars.
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You are on a four lane road.
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Anything makes conditions less than perfect.
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Explanation
The speed limits are set for optimal driving conditions, so it's important to adjust your speed to ensure your safety when conditions are less than ideal. This includes slippery roads, sharp curves or hills where visibility is limited, areas with pedestrians or animals, downtown areas, congested traffic, narrow bridges and tunnels.
Answer Statistics
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This question appears in the following DMV practice tests: