The quickest way to create your own picture for your route is to do this:
1) In Surveyor or Driver, click on Edit Route...
You can then create a route image here as indicated on the screen it doesn't matter what it is. Let it create an image.
2) Close this since you don't need it any longer.
Take your favorite screenshot of your route.
3) Edit and resize/crop the image to 240 x 180.
4) Open the asset for editing in Explorer. You do this by right-clicking on the route in Content Manager.
5) Copy your image you resized/cropped and paste it into the route's folder.
6) Edit the config.txt file
Since you have the folder open, find it and double-click on it to bring it up in Notepad.
7) Look for the thumbnails container.
Code:
thumbnails
{
width 240
height 180
image "$screenshot$.jpg"
}
8) Substitute $screenshot$.jpg for your own image, or rename your image to this - whichever is easiest for you.
9) Save and close the config.txt file.
10) Close the folder.
11) Submit the route in Content Manager.
12) Verify there are no errors and if there are, check your work.
The process takes a lot less time than it did for me to type this out.