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      The Portland area features an extensive light rail 
		system consisting of four routes, with more than fifty-two miles of unduplicated 
		coverage.  The system is collectively referred to as MAX, and is operated 
		by the agency commonly known as TriMet. The 
		original MAX route went between downtown Portland and the eastern suburb 
		of Gresham.  This line started operation in 1986, fairly early in the 
		era of North American light rail renaissance.  That route has since been expanded far to the west, and the 
		entire through service is named the Blue Line.  
		Newer tracks branch off on the Eastside north to Expo Center (Yellow 
		Line), and  to Portland Airport (Red Line).  In 2009 the Green 
		Line began operation, also on the Eastside, but to the south, to 
		Clackamas Town Center.  With system expansion that year, a second route began 
		serving downtown, on a generally north-south alignment.  All four lines cross the Willamette River on 
		the massive Steel Bridge.  
		 In and near center city there is also a modern-day 
		version of a local streetcar line; it is under different ownership, and 
		it is treated in a separate series on this website. 
		 
		There follow in this series a large number of pages from all over the 
		MAX system.  A bit more about the organization of the material is 
		presented on the next page in the sequence. 
		 
		In this photo a westbound Blue Line train is passing along narrow, 
		tree-rich SW Morrison St. in downtown Portland.  
		It is just about to cross the 
		southbound Portland Streetcar track.  The curving rails in the 
		foreground have served as leads to a center city turnaround area at various times during the 
		history of MAX.  These tracks are not currently used by any regular 
		service.  |