Gene Ingram and I got together and checked out the area east of Knightstown and north of Raysville Friday afternoon. No walking--too snowy for that, but everything can be seen from the highway or subdivision streets. I also overlaid a 1936 aerial into my mapping and corrected the interuban route. The end result of these efforts is shown here: http://tinyurl.com/yaqg6b7
This is a very unique site...
The original Indiana Central (later PRR) railroad had a large curve here that was relocated at some point, definitely after 1876, and possibly in the 1900-1920 timeframe that the PRR upgraded other parts of this line. The railroad grade originally followed what is mostly now Star Blvd. and is still mostly intact.
As shown on the above link, the interurban route was mostly destroyed by the construction of US 40. However, it is still visible from the point where it leaves south edge of the US 40 r/w, crosses "Star Blvd", and then hugs the original railroad grade eastward to the point where it is again under the eastbound lane of US 40.
Additionally, prior to the construction of US 40 and the Knightstown Lake reservoir, there was a road that also paralleled the rail grades for a short distance.
I have attached a marked up current parcel map for reference. The interurban line is in red, the original railroad grade is the dashed yellow, the new railroad alignment is solid yellow, and the road grade is in green. I haven't shown all the roads, just the one that was largely abandoned.
So, on the south side of US 40, for a distance of about 750', there are four abandoned grades: an old road, the interurban, the original railroad alignment, and the new railroad alignment.
Later this winter, assuming the snow ever melts, I'll try to get some photos of the remaining grades and post them.