You see a signal or flag person at a road construction site ahead. You should obey his or her instructions:

Answer: D — At all times

The correct response emphasizes the importance of obeying the instructions of a signal or flag person at a road construction site at all times. These individuals are specifically trained to manage traffic safely around construction zones, ensuring the safety of both drivers and construction workers. Following their directions is crucial for maintaining order and preventing accidents in areas that are often altered from normal driving conditions. Ignoring their instructions can lead to dangerous situations, not only for yourself but also for others on the roadway. The other choices suggest behaviors that could endanger everyone in the area. Ignoring instructions, following them only when convenient, or trying to create an alternate route can lead to confusion or collisions, especially in zones that may have limited visibility or changing conditions. Therefore, it is essential to adhere strictly to the directions given by these professionals.