Large trucks are most likely to lose speed and cause a hazard:
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On long, gradual curves.
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On straight, flat highways.
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Going down long gradual hills.
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Going up long or steep hills.
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Explanation
Large trucks can lose speed quickly when they are going up long or steep hills. This can create a hazard for other vehicles on the road. To be safe, always allow more space between you and the large truck in front of you when going up a hill, and be prepared to slow down if the truck loses speed.
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