According to the National Unified Goal, which responders should be involved in setting up advance warning in the initial stages of a roadway incident?

According to the National Unified Goal, the 'Emergency 911' responders should be involved in setting up advance warning in the initial stages of a roadway incident.

Explanation:

The emergency 911 hotline is preferred by most people caught up in situation of emergencies. The same applies to the incidents on roadways. Thus, the responsibility of setting up advance warning to the victim of a roadway incident is with the emergency 911 respondent, in the initial stage.