Question: Is it possible to draw routes with google maps or any other map api? Like when you're looking for direction from point a to point b on google map with `Get Directions` button.

I'd like to draw a line that follows certain road but without the directions I don't need those. And if I can draw multiple lines between multiple points on the map that would be awesome.

Has anyone had experience with this before?

Answer: 
You can either use the [Directions API](https://developers.google.com/maps/documentation/directions/) or, if you really prefer to ignore the directions Google generates, you can use the [maps API drawing functions](https://developers.google.com/maps/documentation/javascript/reference#Polyline) to draw your own lines on the map.
You can also employ "drawing library"
<https://developers.google.com/maps/documentation/javascript/drawing>

But,this experimental tool cant specify colors nor line-thick via GUI.
My enhanced example is at:
<http://members.jcom.home.ne.jp/tcltk-d/ge-navi.html>
(select "Drawing" view to draw)