Emergency Transportation Operations

Highway Evacuations in Selected Metropolitan Areas: Assessment of Impediments

image of a man and woman reviewing a map

Regional Findings

The study found that almost every city cited daily congestion as one of the greatest impediments to planning for mass evacuations. As a result, the following snapshots of the studied metropolitan areas include results from plan assessments, interviews with local planners, and information contained in the INRIX® National Traffic Scorecard: 2009 Annual Report5. The INRIX® scores indicate how severe congestion is relative to other parts of the country and provides a starting point for how severe day-to-day congestion is when considering how to plan for a highway-based evacuation. The data provides additional insight into the highway impediments that will frustrate area attempts to execute a mass evacuation. The INRIX® study looks at 100 metropolitan areas and the routes shown below in green. The areas in red constitute the worst bottlenecks along these routes, as described in the report, and on the individual city maps in the case studies.

The information presented below represents a composite assessment of plans provided by the locations and interviews with city, State and Federal highway division officials, as noted in Appendix 1. The plans are referenced in Appendix 2. However, a few plans are considered "Sensitive," and the full document may not be available to the public.

Figure 1. Map from INRIX® National Traffic Scorecard: 2009 Annual Report
Figure 1. Map from INRIX® National Traffic Scorecard: 2009 Annual Report

Footnotes

5 INRIX® authorized FHWA to use data from its copyrighted report, INRIX® National Traffic Scorecard: 2009 Annual Report

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