Which of the following could indicate reckless driving?

Frequent lane changes without signaling is a strong indicator of reckless driving because it demonstrates a disregard for the rules of the road and other drivers' safety. Signaling is a critical part of safe driving as it communicates your intentions to others, allowing them to respond appropriately. When a driver fails to signal while changing lanes, it not only increases the risk of collisions but also shows a lack of consideration for the flow of traffic. This behavior can create confusion among other road users, contributing to dangerous driving situations and potentially leading to accidents.

In contrast, consistent use of turn signals, maintaining a steady speed, and paying attention to road signs are all behaviors that promote safe driving and contribute to better traffic flow, making them indicators of responsible driving rather than reckless behavior.