When is it permissible to use a mobile phone while driving?

Using a mobile phone while driving is a significant safety concern due to the potential for distraction. The correct choice emphasizes that only hands-free capability is permissible. This is because hands-free systems allow the driver to maintain better control of the vehicle and stay more focused on the road, minimizing the risk of accidents.

In many jurisdictions, the use of mobile phones without hands-free technology is prohibited because it requires physical interaction with the device, thereby diverting attention from driving. By allowing hands-free usage, drivers can engage in necessary communication while still keeping both hands on the wheel and their eyes on the road.

Other scenarios, such as being stopped at a red light or driving at a low speed, do not adequately guarantee safety. For instance, even when stopped at a light, a driver can become distracted or fail to notice changes in traffic signals or conditions. Likewise, driving under 20 km/h may still pose risks, as any distraction can impair reaction times and situational awareness.