How much actual braking does a semi truck do? It's usually cruising down the hig...

		olyjohn 3 days ago \| parent \| context \| favorite \| on: High Diesel Prices Bankrupted 16 Trucking Companie... How much actual braking does a semi truck do? It's usually cruising down the highway, and they tend to use gears and jake brakes down long grades.
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