When is it safe to use a mobile device while driving?

Using a mobile device while driving is considered unsafe at all times, which is why the correct choice is that it is never safe to do so. Engaging with a mobile device can significantly distract a driver, leading to impaired focus on the road, reduced reaction times, and an increased risk of accidents. This applies regardless of the situation, whether you're at a stop light, driving on a highway, or using hands-free mode.

Even when at a stop light, a driver's attention might not remain fully on the road, potentially causing them to miss changes in traffic conditions or not react quickly when the light changes. Driving on the highway often involves higher speeds, where distractions are even more dangerous due to decreased time for reaction. Using hands-free mode may reduce physical distraction since your hands are on the wheel, but cognitive distractions still exist, impairing the driver's awareness and decision-making. Therefore, the safest approach is to avoid using a mobile device at all while driving.