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UPDATE: September 6, 2014
After looking at this for over a year now, tearing my hair out, and just jumping up and down being mad, I am, for the most part, now willing to accept that the Frontage Road is the original Route 2 alignment.
However, I still want to know what is going on with the over-engineered parts of Enquist and Warrendale Roads!

The HCRH Meets The Interstate
Historic Columbia River Highway. Columbia River Gorge National Scenic Area. Oregon. April 23, 2013
Historic Columbia River Highway. Columbia River Gorge National Scenic Area. Oregon. April 23, 2013
In the photo below, from left to right, north to south, are Tumalt Road, Warrendale Road, I-84, NE Frontage Road, and a mysterious winding track through the woods. But which, if any, is the original historic highway?
Tumalt Road, Warrendale Road, I-84, NE Frontage Road, and a mysterious winding track through the woods.
Google Earth. Imagery Date: July 18, 2010
