Which of the following is NOT allowed for drivers under 18?

Drivers under 18 are subject to specific regulations designed to enhance their safety on the road. Talking on the phone while driving is particularly hazardous because it diverts attention from the driving task. Teenage drivers are at a higher risk of accidents, and any activity that takes their focus away from the road can significantly increase that risk.

In contrast, using a GPS is acceptable as it can aid in navigation without diverting attention significantly if used properly. Reporting emergencies is also permitted because it can be critical for safety and communication in urgent situations. Additionally, hands-free devices are allowed, as they allow drivers to communicate without physically holding the phone, reducing some of the distraction involved. Thus, the prohibition against talking on the phone reflects an understanding of the potential risks to young drivers and the importance of maintaining focus while driving.