New Brunswick has a coastal road that must have been designed by a biker.

This seasonal road is not used by heavy trucks, nor driven in winter - this means no ruts or frost heaves.

Part of New Brunswick expanding park infrastructure, there is a toll for this part of the road - but its worth it.  

Steep grades, sharp corners, and numerous switchbacks, the Fundy Trail parkway has high ridge viewpoints, right down to the beach, with expansive views of the bay of Fundy (little foggy on my last trip)