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What do you call the grooves made in a roadway to warn you of an upcoming intersection, or the edge of a road?

Topic: 
Vehicles and Transportation
What do you call the grooves made in a roadway to warn you of an upcoming intersection, or the edge of a road?
This question is new; it was not asked in the 1965-70 survey.
Response: 
RUMBLE STRIP
RUMBLE STRIPS
WARNING BUMPS
N20c
Response Count: 
10
2
1
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