What are the two types of traffic signal maintenance that are generally performed?

The correct response identifies emergency and scheduled maintenance as key types of traffic signal maintenance. Scheduled maintenance refers to regular, planned inspections and servicing of traffic signal equipment to ensure proper functionality and prolong the lifespan of the assets. This can include tasks like checking signal timing, replacing bulbs, and ensuring that all components are functioning correctly.

Emergency maintenance, on the other hand, is performed in response to unplanned events, such as outages or failures caused by accidents, severe weather, or equipment malfunctions. This type of maintenance is critical because it addresses immediate safety concerns and restores traffic flow as quickly as possible.

By understanding these categories, technicians can prioritize their work effectively, ensuring both proactive upkeep and swift responses to unexpected issues. This distinction is essential for maintaining the reliability and efficiency of traffic signals, ultimately contributing to road safety.

While other options mention maintenance types like preventive or routine maintenance, they do not encompass the specific operational approach of addressing both planned and unplanned maintenance tasks as clearly as the chosen answer does.