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Multi-Jurisdictional (Complex) Areas

The boundaries of a metropolitan planning organization (MPO) do not always correspond to the nonattainment or maintenance area boundary, nor does a nonattainment or maintenance area always contain a single MPO. In addition, a nonattainment or maintenance area boundary may encompass portions of more than one state. Also, there may be some portion of the nonattainment or maintenance area that is not included in any MPO's planning area. The following documents provide information about transportation conformity issues related to these multi-jurisdictional areas.

Policy & Guidance

Superseded Guidance

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Updated: 12/17/2014
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