What is the accepted difinition of a divided highway pertaining to vehicle driving rules of the road?

Question

do double yellow lines constitute as a divided highway

Answer 1

Double yellow lines mean that it's not safe to pass either direction

Answer 2

A divided highway is a roadway divided by two sets of solid double yellow lines

Answer 3

A roadway having lanes running in opposite directions that are separated by some substance not meant to drive on.  Concrete, grass, dirt, etc.  Double-yellow line do not constitute a divided highway, as they mean that cars coming in either direction cannot drive to the left of the center of the road (normally to pass). You can turn across double yellow lines, so that is not a divided highway.

AZ traffic school and driver's ed instructor for 5+ years

Answer 4

Having the lanes for opposing traffic separated: divided highways.

Having a median strip or island between lanes of traffic moving in opposite directions.