Ben--What you are looking for(route marking) is already in existance but I don't know where I have seen it before.<br><br>I use WikiMapia embedded in my websites.<br><br>You may find some useful information here at:<br>
<br><a href="http://googlemapsmania.blogspot.com/2007/04/new-to-google-maps-mania.html">http://googlemapsmania.blogspot.com/2007/04/new-to-google-maps-mania.html</a><br><br>Good Luck.--jack marting<br>