Which of the following actions is not allowed when driving in Maryland?

Passing a school bus with lights flashing is not allowed when driving in Maryland because it poses a significant safety risk to children who may be getting on or off the bus. When a school bus has its red lights flashing and the stop sign extended, drivers in both directions are required to stop, unless they are on an opposite roadway separated by a physical barrier. This law is in place to protect children and ensure their safety as they enter or exit the bus.

The other actions listed are permissible. Using a hands-free device to talk while driving is allowed in Maryland, as it minimizes distractions compared to handheld devices. Yielding at a roundabout is a standard driving practice that helps maintain traffic flow and safety at intersections. Stopping for a red light is a fundamental traffic law that ensures orderly and safe movement at intersections.