What must you do at stop lines, yield lines, and crosswalk lines?

At stop lines, yield lines, and crosswalk lines, the correct procedure is to stop behind them if signaled to do so by a traffic sign or signal. These markings are designed to enhance safety by providing clear guidance on where vehicles should come to a complete stop. This ensures that drivers give way to pedestrians at crosswalks and follow traffic signals effectively.

Stopping behind these lines allows for better visibility of pedestrians and other vehicles, reduces the risk of collisions, and maintains the flow of traffic. It is crucial for drivers to respect these markings as part of responsible driving behavior, contributing to overall road safety.

The other choices do not align with traffic laws and best practices. For instance, stopping in front of these lines could endanger pedestrians and disrupt traffic flow. Treating the lines as advisory allows for too much discretion and poses safety risks. Finally, never stopping at these lines contradicts the requirement to yield or stop based on traffic signals, which is essential for safe driving in shared spaces.