Maintaining a safe speed and being vigilant when approaching a construction zone is essential for several reasons. Construction zones often have reduced speed limits to protect both the workers and the drivers. By adhering to these speed limits, drivers contribute to the overall safety of the area. Being vigilant means staying aware of changing conditions, such as workers in the roadway, vehicles entering or exiting the zone, and potential detours or obstacles. This combination of awareness and appropriate speed helps minimize the risk of accidents and ensures that drivers can respond appropriately to any sudden changes in traffic patterns or worker activities. Other options, such as honking horns, can be disruptive and could startle workers, while aggressive lane changes can lead to collisions in areas with heightened hazards. Stopping and exiting vehicles is unnecessary and could further impede traffic flow, leading to dangerous situations for both the stopped vehicle and approaching traffic. Therefore, the practice of maintaining a safe speed and being vigilant is the most responsible and safe approach for drivers in construction zones.

A yellow warning sign signifies special conditions or hazards that may arise on the road ahead. These signs are designed to alert drivers to potential risks, helping them to navigate the roadway safely. For example, a yellow warning sign may indicate curves, intersections, or changes in road conditions such as construction zones or animal crossings. By providing this advance notice of possible dangers, yellow warning signs play a crucial role in promoting safe driving and reducing the risk of accidents. They serve as a proactive measure, encouraging drivers to modify their speed or be more cautious in certain areas to ensure their safety and the safety of others.

The correct answer highlights that criminal penalties for Driving Under the Influence (DUI) are primarily handled within the court system. When someone is charged with DUI, the case typically goes through the judicial process where a judge or jury determines guilt and establishes consequences such as fines, license suspension, community service, or even jail time depending on the severity of the offense and whether it is a repeat incident. DUI penalties reflect the serious nature of the offense, aiming to deter future violations and promote safety on the roads. Although the DMV plays a role in enforcing administrative penalties, like license suspensions or revocations based on the DUI charge, the criminal aspect of DUI is processed by the court. This distinction is crucial, as it clarifies that while the DMV manages driving privileges, the court system oversees the legal repercussions of committing a DUI offense. In this context, the DMV has a different function focused on driving records and licensing, while the court deals directly with legal penalties and criminal laws.

Drivers are required to yield to pedestrians at unmarked intersections, making this option the correct choice. Unmarked intersections are locations where there are no signs or signals directing traffic, but pedestrians still have the right of way. This rule is in place to ensure safety and promote the smooth flow of both vehicle and foot traffic. Yielding to pedestrians is crucial because it helps prevent accidents and protects vulnerable road users. Pedestrians may be crossing at these points without any traffic control, thus being particularly at risk. The law emphasizes that drivers should always be vigilant and prepared to stop for pedestrians, regardless of whether the intersection is marked or not. This reinforces the broader obligation for drivers to be cautious and considerate of all road users.