There is now a road-making tutorial in the wiki, which explains the complete process of road-making, including bulldozing the terrain and painting the asphalt.
Here's a screenie to whet your appetite:
![Image](http://www.bundysoft.com/L3DT/gallery/dump/RoadDemoPic.jpg)
Please let me know if you find any mistakes or have have any suggestions for improvement.
Cheerio,
Aaron.