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Major Roadway Incident

Hazard in Civil Disruptions & Infrastructure

A frequent, high-impact hazard — multi-vehicle crashes and cargo spills that close corridors and stretch EMS.

Plans also call it: highway incident, multi-vehicle crash, mass casualty crash, trucking accident, highway closure

Talk to us about Major Roadway IncidentAll 72 hazards →

Sample brief

The first page of a Major Roadway Incident brief: likelihood, impact and readiness on your own scale, with each figure sourced.

Evidence brief for Cedar Ridge County (example)

September 14, 2026

Major Roadway Incident

Hazard in Civil Disruptions & Infrastructure, on the established threats & hazards list

Impact
5432112345

Likelihood

Likelihood
4

Likely — Expected within the decade — roughly once in 1 to 10 years (10–100% chance in any year).

Impact
3

Moderate — Notable effects — injuries possible, damage in multiple areas, essential services disrupted for days.

Readiness
2

Low — Some elements of capability are in place, but important gaps remain that could significantly limit the organization's ability to perform effectively. Additional development is needed before the capability can be relied upon.

  • 2source documents
  • 58verified mentions
  • —federal declarations
  • —NRI risk score
Worked example: Cedar Ridge County is fictional. The scores illustrate the format and are nobody's decision. Open a full sample brief →

The national record

FEMA’s National Risk Index doesn’t model Major Roadway Incident. Your team fills it with local evidence, and Hazzard shows the gap rather than a zero.

How it maps

The same hazard in the vocabularies your plan and FEMA already use.

FEMA National Risk Index
Not covered
FEMA declaration incident type
Not covered
NOAA Storm Events type
Not covered
Hazzard category
Civil Disruptions & Infrastructure, human-caused and societal

The national record

What the federal data says about Major Roadway Incident: nothing yet

No federal dataset scores Major Roadway Incident or files declarations under it. That's common for threats and emerging hazards, and it's why a brief for Major Roadway Incident is built from your own plans, exercises and records. Hazzard shows the gap instead of inventing a number.

In your plan

What a Major Roadway Incident profile needs, and where each part comes from

A local hazard mitigation plan profiles each hazard the same way (44 CFR 201.6). Here is how Hazzard fills each part for Major Roadway Incident.

  1. Location

    44 CFR 201.6(c)(2)(i)

    Your documents

    No national layer maps Major Roadway Incident. We draw the geographic extent from your plans, studies and annexes, cited to the page.

  2. Extent

    44 CFR 201.6(c)(2)(i)

    Your documents

    The magnitude your plans use for Major Roadway Incident (a scale, a depth, an acreage, a duration), read from your documents and cited, so the profile states the strength you plan for.

  3. Previous occurrences

    44 CFR 201.6(c)(2)(i)

    Your documents

    FEMA files no declaration type for Major Roadway Incident. The history comes from your after-action reports, incident records and plans.

  4. Probability of future events

    44 CFR 201.6(c)(2)(i)

    Your team decides

    No national dataset gives a frequency for Major Roadway Incident. Your team scores likelihood on your scale from the evidence we organize.

  5. Vulnerability and impacts

    44 CFR 201.6(c)(2)(ii)

    Your documents

    The Census population profile and HHS emPOWER counts for context; the consequences themselves come from your plans and exercises.

  6. The assessment itself

    Your team decides

    Likelihood, impact and readiness for Major Roadway Incident are drafted with every source attached, and a person on your team accepts each one. Hazzard never records a score on its own.

How we can help

How we’d help you prepare for Major Roadway Incident

  1. 1

    We pull who depends on it

    HHS emPOWER counts of electricity-dependent residents and the Census profile of your county, gathered before we meet.

  2. 2

    We read your continuity plans

    Your EOP, continuity and mass-care material, so what they say about Major Roadway Incident is cited and the gaps are visible.

  3. 3

    You leave with a cited brief

    Likelihood, impact and readiness for Major Roadway Incident on your own scale, with each figure tied to its source. It is ready for your planning team or council.

Also in Civil Disruptions & Infrastructure

Preparing for Major Roadway Incident

Prepare for Major Roadway Incident with the people it would reach in view.

Outages, corridor incidents and structural failures are measured in who goes without and what stops moving. We put your plans next to the residents and systems they depend on. We reply within one business day.

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