In which scenario is it illegal to use a handheld device while driving?

Answer: B — When the vehicle is in motion

Using a handheld device while driving is illegal when the vehicle is in motion. This law is designed to enhance road safety by minimizing driver distractions. When a driver uses a handheld device, their attention is diverted away from the road, increasing the risk of accidents. By prohibiting the use of such devices while driving, authorities aim to ensure that drivers remain focused on controlling their vehicle and responding to traffic conditions effectively. In contrast, it is permissible to use a handheld device when the vehicle is parked, as there is no risk of causing an accident at that time. Similarly, if a vehicle is stopped at a red light, the driver is technically not considered to be driving, and thus may use a handheld device. Furthermore, adhering to speed limits does not impact the legality of using handheld devices, as the primary concern is driver distraction rather than speed. Focusing on the scenario of driving, particularly when the vehicle is in motion, underscores the importance of maintaining full attention on the road for safety.