What does a solid yellow line on the road signify?

A solid yellow line on the road signifies that passing is not allowed. This marking is used to indicate that it is unsafe to overtake another vehicle in that area due to factors such as poor visibility, oncoming traffic, or other hazards. The solid yellow line is a clear warning to drivers that they must remain in their lane and cannot cross over to pass another vehicle. This is essential for maintaining safety on the roads, as it prevents potential collisions that could occur if a driver were to attempt to pass in areas where visibility or road conditions do not permit it.

The other options represent different road markings or conditions: passing is allowed with a broken yellow line, bike lanes typically have specific markings that denote their purpose, and areas of construction would usually have signs or cones to indicate such conditions.