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Highway Capacity Reductions with OSOW Loads

James Romanowski
Wisc. Dept. of Transportation SW-Madison
Highway Capacity Reductions with OSOW Loads was posted on February 13th, 2015 at 1:32 PM EST

Does anyone have experience with determining the reduction in highway capacity when adding an oversize overweight load into a tw0-lane and three-lane freeway scenario? The OSOW load is moving at 45- 55 mph while the posted speed is 65 mph. We observed this OSOW load is a rolling bottleneck that tends to impede traffic from getting around it. Would like to understand what calculations may be available or appropriate to estimate the reduction in capacity.

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