The following is my road system. 3mm MDF board cut with interlinking notches to prevent movement during play. I have not decided on a type of flock\static grass to use and therefore the dry brushing and flocking still need to be done.
Long Turns with starts and ends.
Short Turns with starts and ends.
Straight Sections with long, medium, short, starts and ends.
Any road setup can be created with these sections.