What are “backup batteries” used for in traffic signal systems?

Backup batteries in traffic signal systems are crucial for ensuring continuous operation during power outages. When the main power supply fails, these batteries provide the necessary energy to keep traffic signals functioning, which helps maintain roadway safety and prevent accidents by ensuring that signals remain visible and operational even in the absence of electricity.

The batteries act as a reliable power source, allowing traffic signals to continue their programmed cycles, thereby managing traffic flow effectively despite external power disruptions. This minimizes confusion among drivers and pedestrians, enhancing the overall safety of the intersection or roadway.

While other options pertain to different aspects of traffic signal management, they do not reflect the primary purpose of backup batteries. For instance, enhancing brightness isn’t a function attributed to batteries in this context; rather, it’s related to the type of lights used. Resetting signal timings and storing energy for peak hours relate to operational procedures but fall outside the direct use of backup batteries within traffic signal systems.