(Portland, OR)  --  Police say impaired driving contributed to the death of a pedestrian during a crash in North Portland.  Investigators believe the 27-year-old pedestrian was hit around one o'clock yesterday morning by a vehicle driven by 21-year-old Matthew Tyler Freeman.  Authorities say Freeman crashed his car into a pole about a block away, in the area of North Lombard Street and Peninsular Avenue.  Freeman will appear in court later today.  The name of the pedestrian hasn't been released.