Not sure what area of the country to ride in, but by my experiences driving around the US, I wouldn't call them pervasive. Most areas I see them, I see the reason for them (rapidly upcoming corner, road dips just a head, etc).
Having driving overseas in SW & SE Asia, I see more 'No Passing Areas' in those area's of the world than I see in the States.
Yet to experience Europe... Looks like maybe next tour.
Having driving overseas in SW & SE Asia, I see more 'No Passing Areas' in those area's of the world than I see in the States.
Yet to experience Europe... Looks like maybe next tour.