When can you use a cell phone while in a commercial vehicle?

Using a cell phone in a commercial vehicle is heavily regulated due to safety concerns. The correct answer emphasizes that you are allowed to use a cell phone only in hands-free mode and only during emergencies. This reflects the intention of maintaining road safety by minimizing distractions for drivers of commercial vehicles, which are typically larger and more challenging to maneuver than standard vehicles.

Since distractions can significantly increase the risk of accidents, the focus on hands-free operation ensures that drivers can remain focused on the road while still being able to communicate in critical situations. The stipulation for emergencies reinforces that the primary concern is safety and proper handling of the vehicle at all times.

Other options do not align with regulations or best practices; for example, using a phone anytime for navigation may encourage unsafe behaviors, while personal calls can distract from driving responsibilities. Similarly, using a phone when parked may lead to confusion about when it's actually safe to use a device, as the rules are intended to prioritize safe driving behaviors at all times on the road.