What does a double yellow line mean?

A double yellow line is a traffic marking that signifies no passing is allowed. This means that vehicles traveling in either direction are prohibited from crossing these lines to overtake another vehicle. The primary purpose of this marking is to enhance safety on the road by indicating that the roadway conditions or visibility do not allow for safe passing. This can be due to factors such as curves, hills, or intersections where visibility is limited, making it dangerous for vehicles to attempt to pass.

The other options are relevant to different scenarios on the road but do not apply to a double yellow line. For instance, no stopping would typically be indicated by different signage, and no turning restrictions are generally marked by specific signs or markings. Passing allowed with caution would generally be indicated by a single broken yellow line, which permits overtaking when it is safe to do so. Hence, the presence of double yellow lines specifically signals that drivers must remain in their lanes and refrain from passing.