Version: Alpha 7
I have noticed when building roads of any size/length the game while have minor lag throughout the construction. When the road is finished, the lag disappears. I have not noticed the lag on any other construction project.
Edit 1: This also include digging the trench before placing the stone.
Edit 2: I do not experience any error messages during Road construction.
Edit 3: Uploaded footage of said lag. Pay particular attention to the running while the roads are being constructed.