What does the double solid line on a road signify?

The presence of a double solid line on a roadway clearly indicates that no passing is allowed. This marking signifies a safety precaution for drivers, as it is typically used in areas where visibility may be limited or where passing could create dangerous situations, such as on curves or near intersections. The double solid lines reinforce the importance of staying in one's lane and not attempting to overtake another vehicle in those designated segments of the road, ensuring the safety of all road users.