FILE - In this Jan. 28, 2011 file photo, Col. James Prochniak, superintendent of the North Dakota Highway Patrol, speaks at a news conference in Bismarck. The North Dakota Highway Patrol is urging motorists to obey the state's "move over" law after four crashes in five months involving patrol vehicles struck by other vehicles. The law requires motorists to move to a far lane when they encounter an emergency or maintenance vehicle on a multi-lane highway, or to reduce speed if they are unable to move over. (AP Photo/Dale Wetzel, File)
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