What does a double yellow line mean?

A double yellow line indicates that no passing is allowed in either direction. This marking is used primarily on two-way streets where there is traffic moving in opposite directions. The purpose of the double yellow line is to ensure the safety of drivers by preventing them from overtaking vehicles in situations where visibility may be limited or where it is dangerous to do so, such as in the vicinity of curves, intersections, or other hazards. This clear restriction helps to reduce the likelihood of collisions and maintain orderly traffic flow. Other options may suggest that passing is permissible in certain scenarios, but the double yellow lines specifically communicate a prohibition on passing altogether for both directions of travel.