Just outside of Applegate, Ca., The Lincoln Highway passes through a 1927 subway, under the railroad tracks.  Apparently, the original roadbed actually climbed up, and over the railroad tracks, making for a dangerous mix of trains and autos.. I assume as traffic picked up over the years, the highway department decided to build these subways, thus avoiding car train meetings. 

There use to be an old wagon parked here, likely representing the fact that this is also an old wagon route from the 1800's. Now this old auto has shown up in it's place. A Lincoln Highway tribute, no doubt.

This is the view from the old alignment that crossed over the tracks. You can see the subway entrance up ahead, and to the right, below the tracks. 

Monica is pointing to where The Lincoln Highways first route came out of the shrubbery, and trees  to cross the tracks. We are facing southwest. 

Now we are heading down The Lincoln Highway, after having crossed the railroad tracks, which can be seen up, and to the right.