The Correct Answer and Explanation is:
The correct answer is b) Solid yellow lines.
Raised highway dividers and solid yellow lines serve the same essential purpose: to separate traffic moving in opposite directions and strictly prohibit drivers from crossing into the oncoming lane.
A raised highway divider is a physical barrier, such as a concrete median, a guardrail, or a landscaped strip. Its primary role is to enhance safety by creating a physical separation that prevents vehicles from accidentally or intentionally moving into the path of oncoming traffic. This is the most definitive form of lane separation, making a head-on collision nearly impossible. Crossing such a divider is illegal and extremely dangerous.
Similarly, solid yellow lines on the pavement are used to mark the center of a road with two-way traffic. A double solid yellow line, the most common configuration, creates a legal barrier that drivers are not permitted to cross to pass other vehicles. This marking is used in areas where it is unsafe to enter the opposing lane, such as on hills, curves, or in areas with heavy traffic.
While the raised divider is a physical object and the solid yellow line is a painted marking, their function for traffic control is identical. Both communicate a non-negotiable rule to stay on your side of the road to prevent head-on collisions.
The other options are incorrect because they serve different purposes. White lines, whether solid or broken, are used to separate lanes of traffic moving in the same direction. Broken lines, both yellow and white, specifically indicate that crossing the line for lane changes or passing is permitted when it is safe, which is the opposite of the function of a raised divider.
