I use Adobe Illustrator for maps. It is an expensive software for pros, but can be had on eBay, in older versions, at a fraction of the retail cost. It has a means to draw black lines of varying thickness on one layer, copy them to another layer, change their width then their color to white. Intersections come out as intersections. The original black lines can be drawn on a layer over a copied Google map that can be hidden in the final version. The final file can be large, but can be reduced to less than 1Meg using (free) PDF Shrink without much loss of resolution. I started to make the roads the course uses much wider than the other roads. Other landmarks or features can be added as needed for clarity.
A couple examples:
CT07016JHP, CT07023JHP, CT08009JHP