Guidance on Applicable Methodologies to Account for the Benefits of Infill in SIPs and Conformity Determinations
This memo guides the use of the four methods in preparing SIPs and transportation conformity determinations.
An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
This memo guides the use of the four methods in preparing SIPs and transportation conformity determinations.