My name is Will Pittenger. I have been making KMZ sets for Google Earth for a long time. After I starting making those, I wanted overlays for my sets. I was unsatisfied with the accuracy of the images available at Wikimedia Commons. So I started making my own with Inkscape and uploading them. Then I needed a place for anyone that liked my KMZ sets and/or maps to find others. For a while, a simple blog sufficed. But, once I started getting requests, I knew I needed something better. This site is the result. You are welcome to set up an account. Some activities are for registered users only. Take your time poking around and let me know what you think.
There were a lot of questions, but I ended up deciding to include a
series of placemarks listing them. Otherwise, I guessed the route as
best I could. I included my map of the track as an overlay, placemarks
for each turn, placemarks for each street used, a polygon for the track,
a path for pit road, and more. You can get the KMZ here.
You talking about what you see in Google Earth or my map? If you mean Google Earth, the only such lines I see there are from normal traffic. I also checked historical images just in case.