Transportation Conformity Reference Guide

Part II: How to Use this Document

This part of the guide describes how the Transportation Conformity Reference Guide is organized. The guide is organized in four parts with six major sections and fifteen chapters so that practitioners can quickly find needed information in a concise and easy to read format.

part I discusses the purpose and need for the guide and Part II provides information on how to use the guide including a navigation tool to Part III (see Exhibit ll-1). Part III includes detailed information on all aspects of the transportation conformity process. The navigation tool for Part III is provided to help readers easily access subjects of interest. All readers should review Part III: Sections A, B, and C which provide an overview of transportation conformity, SIP requirements, and general requirements, respectively. Chapters 1-5 include information about requirements that apply to all nonattainment and maintenance areas and should also be reviewed by all readers. Part III: Sections D, E and F and Chapters 6-14 include specific information on regional analysis and project level analysis requirements. Part IV contains information about emerging issues that will affect transportation conformity in the future and should also be reviewed by all readers.

Key for Users

Each chapter contains relevant statutory, rule, and preamble language (in italics) and a description of issues, requirements and procedures for making a transportation conformity determination. Frequently asked questions with answers are provided in many chapters of the guide. In addition, useful references and appendices are noted throughout the guide, and appendices are included in the back of the guide. Finally, a glossary and bibliography are included at the end of the guide. Below is a summary table showing how the entire guide is organized.

Summary Table

Part I: Purpose and Need

Part II: How to Use This Guide

Part III: Transportation Conformity Requirements (Detailed information is presented in six sections and fifteen chapters as shown below and in Exhibit ll-1)

Part IV: Emerging Issues

Exhibit ll-1Navigation Tool to Part III of the Transportation Conformity Reference Guide
Contents of Part III-Transportation Conformity Requirements	Ozone Serious and Above	Ozone Moderate and Below	CO Moderate and Above >12.7ppm	CO Moderate and Below <12.7ppm	PM2.5	PM10	NO₂	Donut or Clean Data Areas	Isolated Rural Areas
Section A - Overview Section B - SIP Requirements Section C - General Requirements	INSTRUCTIONS: This chart shows how Part III is organized. All readers should review Sections A, B, C, and Chapters 1- 5. In addition, based upon the pollutant type and nonattainment or maintenance area status, see other sections of the Guide as needed.
Chapter 1 - Plan and TIP	X	X	X	X	X	X	X	X	X
Chapter 2 - Interagency Consultation	X	X	X	X	X	X	X	X	X
Chapter 3 - TCMs	X	X	X	X	X	X	X	X	X
Chapter 4 - Conformity Lapse and Freeze	X	X	X	X	X	X	X	X	X
Chapter 5 - Regional Emissions Analysis	X	X	X	X	X	X	X	X	X
Section D - Specific Regional Analysis Requirements
Chapter 6 - Ozone and CO Nonattainment Areas	X	X	X	X				X	X
Chapter 7- 8-Hour Ozone Areas without 1-Hour SIP Budgets	X	X						X	X
Chapter 8- 8-Hour Ozone Areas with 1-Hour SIP Budgets	X	X						X	X
Chapter 9 - PM2.5 Nonattainment and Maintenance Areas					X			X	X
Chapter 10 - PM10 Nonattainment and Maintenance Areas						X		X	X
Chapter 11 - NO2 Nonattainment Areas							X	X	X
Section E - Requirements for Other Areas
Chapter 12 - Donut and Clean Data Areas	X	X	X	X	X	X	X	X	X
Chapter 13 - Isolated Rural Areas	X	X	X	X	X	X	X	X	X
Section F - Project Level Conformity	X	X	X	X	X	X	X	X	X
Chapter 14 - CO and PM10 Hot-spot Analysis			X	X		X		X	X