The traffic striping marks of diagonal yellow lines are on streets and highways. These indicate?

Diagonal yellow lines on streets and highways serve a clear and specific purpose. They are used to indicate that the road is narrowing or that there is an obstruction present on the roadway. This visual cue informs drivers to exercise caution, as they may need to adjust their speed or position on the road to ensure safety. Recognizing these lines helps to prevent accidents by alerting drivers to potential hazards ahead, such as construction zones or other obstructions that could affect the flow of traffic.

The other options refer to different types of markings and rules that do not accurately describe the meaning of diagonal yellow lines. For instance, reserved lanes for high occupancy vehicles would typically have specific signs or different types of markings indicating such restrictions. A no-passing zone would generally be marked with solid yellow lines rather than diagonal ones. Lastly, pedestrian crossings are indicated with different symbols or markings, focusing on foot traffic rather than cautions related to roadway conditions. Understanding the correct meaning of various traffic markings is crucial for safe driving practices.