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Transportation Incident

Hazard in Infrastructure

A corridor hazard on road, rail, air, transit and water, from a multi-vehicle crash to a derailment carrying hazardous cargo, that closes routes and stretches EMS.

Includes: Major Roadway Incident, Rail Incident, Aviation Incident, Mass Transit Incident, Maritime / Port Incident, Dense Fog

  • Major Roadway Incident. A frequent, high-impact hazard, multi-vehicle crashes and cargo spills that close corridors and stretch EMS.
  • Rail Incident. A transportation hazard where derailments can release hazardous cargo into the communities the tracks run through.
  • Aviation Incident. A rare but mass-casualty-capable hazard at or near airports and along flight paths.
  • Mass Transit Incident. A high-occupancy hazard on buses, trains and subways, where one incident affects many riders and a city's mobility.
  • Maritime / Port Incident. A waterborne hazard, collisions, groundings, fires and spills, that can shut a port and the supply chain behind it.
  • Dense Fog. A transportation-safety hazard, near-zero visibility behind chain-reaction crashes on highways, runways and waterways.
See a sample briefBook a walkthroughAll 31 hazards →

Sample brief

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

Evidence brief for Cedar Ridge County (example)

September 14, 2026

Transportation Incident

Hazard in Infrastructure, on the established threats & hazards list

Impact
5432112345

Likelihood

Likelihood
2

Unlikely — Possible but infrequent — roughly once in 50 to 100 years (1–2% chance in any year).

Impact
4

Major — Severe effects — casualties possible, serious damage across a significant share of the jurisdiction, essential services disrupted for weeks, outside assistance needed.

Readiness
3

Moderate — The organization has a generally established capability to manage this threat or hazard, but identifiable gaps remain. The organization could likely perform many required actions, though effectiveness may vary depending on conditions, staffing, resources, or complexity.

  • 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 Transportation 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
Dense Fog, Freezing Fog
Hazzard category
Infrastructure, infrastructure and technologyincludes Major Roadway Incident, Rail Incident, Aviation Incident, Mass Transit Incident, Maritime / Port Incident, Dense Fog

The national record

What the federal data says about Transportation Incident: nothing yet

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

In your plan

What a Transportation 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 Transportation Incident.

  1. Location

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

    Your documents

    No national layer maps Transportation 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 Transportation 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 Transportation 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 Transportation 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 Transportation 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 Transportation 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 Transportation Incident is cited and the gaps are visible.

  3. 3

    You leave with a cited brief

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

Also in Infrastructure

Preparing for Transportation Incident

Prepare for Transportation 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.

Book a walkthrough

Takes about two minutes. A person reads each request.

Or start by marking your area on the map