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           PITTSBURGH LIGHT RAIL 
              Signals, Descent, Skyline  | 
         
       
      
     
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            Most of the current "T" operation is 
			double-track, but the 52 Allentown trackage briefly narrows to a single 
			set of rails for access to and from Panhandle Bridge.  This midday scene -- 
			no trains run at this time -- shows signals for the approach to that 
			stretch of track, as well as part of the downtown skyline.  | 
         
        
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