How does the MUTCD define a Major Incident?

The correct choice defines a Major Incident as one that takes more than two hours to clear. In the context of Traffic Incident Management (TIM), this definition highlights the significant impact that extended incidents have on roadways and traffic flow. Major Incidents typically result in prolonged disruptions, necessitating specialized resources and coordination among emergency responders to manage both safety and traffic concerns effectively.

Incidents that require a longer clearance time tend to escalate in complexity, often leading to increased congestion and potential secondary incidents. Recognizing an incident as a Major Incident allows agencies to mobilize the appropriate response plans and resources to mitigate the situation more effectively.

In contrast, incidents cleared in under 30 minutes would not fall under this definition, as they are generally not categorized as severe enough to warrant elevated response protocols. While hazardous materials can definitely create significant incidents, their involvement alone does not categorize an incident as Major unless it also results in a lengthy clearance. Similarly, incidents occurring during peak traffic hours may exacerbate the situation but are not classified as Major based solely on timing. Therefore, the definition focuses on the clearance duration, clearly identifying when a situation escalates to a Major Incident.