New Skill, Road Building: Build a milestone. (Right) Click extend. You now have a cursor to place a second milestone. The second milestone needs to be placed within 500 pixels of the one you just extended from. You can CTRL+LMB to walk with this cursor active (much like archery). Place as many milestones as seems adequate. On the original milestone, select "Make Trail". You now get to name the trail, and you'll be given a sign. Connect this trail sign to the next milestone. This next milestone can now be right clicked to retrieve yet another sign. Connect this new sign to the next milestone again, and, again, picking up new signs as you move along. Wash, rinse and repeat. Once you've connected up a nice little trail, you can now follow it by rightclicking on any of the connected milestones. Your dude will walk, and pathfind, as best as he can, along the road.
The radius on the original milestone, shown during placement, is the "turn radius". Once the dude enters this circle, when following a trail, he'll start pathfinding towards the next stone in line.
The cart now squishes small animals.
We're not sure if this will be of any major utility, but it could perhaps prove an interesting experiment.
Enjoy.