What is the primary effect of using a mobile device while driving?

Using a mobile device while driving contributes to reduced situational awareness, which is a critical factor for safe driving. This occurs because engaging with a mobile device typically diverts attention from the road and surrounding environment. When a driver's focus is split between the device and the task of driving, their ability to notice and react to important cues—such as traffic signals, pedestrians, and other vehicles—is significantly impaired. This distraction can lead to slower response times and an increased likelihood of accidents.

While a mobile device can enhance navigation and communication in some contexts, these potential benefits are outweighed by the risks associated with distracted driving. The act of looking at a screen or texting, for instance, pulls a driver's attention away from the road, demonstrating how detrimental mobile device use can be to overall situational awareness. Therefore, the primary effect of using a mobile device while driving is indeed a reduction in the driver's ability to maintain awareness of their immediate surroundings, increasing the danger of driving.