Which of the following is not classified as an "authorized emergency vehicle" according to the Transportation Code?

An authorized emergency vehicle is defined within the Transportation Code to include vehicles specifically designed and admitted for emergency use, such as those operated by emergency services. This category typically encompasses ambulances, fire trucks, and police vehicles, each of which plays a crucial role in responding to emergencies and often enjoys specific privileges on roadways when engaged in their official duties.

A utility truck does not fall under this classification because it is not specifically designed or primarily used for emergency response purposes. Instead, utility trucks are utilized for providing essential services such as electricity, water, or telecommunications repair, and while they may respond to emergencies related to their services, they do not have the same legal standings or traffic privileges as the properly classified emergency vehicles. Therefore, the utility truck is the correct choice as not being classified as an authorized emergency vehicle according to the Transportation Code.