What do double solid lines signify on the service road?

Double solid lines on the service road signify no passing zones. These lines are implemented to ensure safety by indicating areas where drivers should not overtake other vehicles. The absence of passing is crucial in locations with limited visibility or where the road may have conditions that require extra caution, such as proximity to intersections or pedestrian crossings. This rule helps maintain a steady flow of traffic and minimizes the risk of accidents, as it discourages risky maneuvers that could lead to collisions. The other options, while related to road use, represent different specific regulations and visual cues that do not apply to the meaning of double solid lines.