Complex sentence: The Rhode Island Department of Transportation estimated that this vehicle volume would exceed 25,000 by 2005, which was seen as extremely dangerous given the road's sharp curves and 25 miles per hour speed limit.
Split into simpler sentences: The Rhode Island Department of Transportation estimated that this vehicle volume would exceed 25,000 by 2005. This high vehicle capacity was seen as exceeding the limit of the local road, particularly given the road's sharp curves and 25 miles per hour speed limit.