Test routing graph is a tool to examine autorouting of roads so it turns out the way you expect it. Its always good practice to use this tool after you’ve drawn a new road, especially those with one-way streets. The tool is fairly straigtforward to use: click on a beginning point A and then an end point B and the autorouting engine will find the shortest path based on distance or the fastest path based on the route class and speedlimit, depending on your option.
