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Office of Planning, Environment, & Realty (HEP)

CO Categorical Hot-Spot Finding

February 26, 2014

Cover of Federal Register

Regulatory Background

A CO categorical hot-spot finding was included in the January 24, 2008 transportation conformity amendments final rule at 40 CFR
93.123(a)(3) and explained in the preamble at
73 FR 4432-4434

Conformity Rule Summary

DOT, in consultation with EPA:

Signed February 12, 2014

Screenshot of CO categorical hot-spot finding memorandum


CANNOT USE: If one or more parameters are outside the acceptable range for any of the intersection approaches

Project Parameters

Image of file cabinet drawer with hands checking a folder

Project Level Conformity Determination Documentation


Under FHWA's Conformity Website


Emily Biondi

Updated: 1/31/2017
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