If you "take to the road," then you travel along it, so this idiom means that you started a journey of some sort.
the silk road was the road marco polo took to go to china but took a boat back
it means on the other side of the road or across the road
Since the main road was blocked, he took a secondary road.
He took the "road less taken."
I took a long drive down the winding road to reach my friend's house.
it means on the other side of the road or across the road
It means the road surface is uneven - and may cause damage to suspension.
A US word that means an animal found on the road dead is roadkill or road kill.
It's a synonym for dirt road (i.e. an unpaved road).
There is a low place in the road.
It means you have seen a road runner.
The route Polo and his father took was not a road ( they really didn't exist) and was by water and land. It took them 4 years to reach China and they went through countries like Iran. It was a very hard, dangerous, and difficult journey.