What is an example configuration of Emergency-Vehicle Traffic Control Signals?

The example configuration of Emergency-Vehicle Traffic Control Signals that includes a three-section traffic signal with circular red, circular yellow, and smaller circular yellow indications is designed with specific functions in mind.

In this configuration, the circular red signal indicates that vehicles must stop, promoting safety especially in areas where emergency vehicles are active. The standard circular yellow serves as a warning that signals drivers to prepare to stop, while the smaller circular yellow indications are often utilized specifically for emergency vehicle situations. These smaller indications can be designed to capture drivers' attention more effectively, ensuring they recognize the presence of an emergency vehicle and yield appropriately.

The distinct yellow indications can also be programmed to flash or activate in response to emergency vehicle approaches, enhancing the visibility of the signal to regular drivers. This clarity and focus on quick recognizable signals are crucial for maintaining safe traffic flow during emergency responses. The three-section design thus facilitates clear communication between traffic control devices and drivers in the presence of emergency situations.