Products, Services, and Data

Air Quality Conformity Demonstrations

When COMPASS develops or updates the regional long-range transportation plan (Communities in Motion) or the Regional Transportation Improvement Program (TIP), it is required to demonstrate that the transportation projects funded via these plans will not degrade air quality in the Treasure Valley. This is referred to as an “air quality conformity demonstration.” Learn more.

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Update: This conformity document was updated on September 1, 2020, during the comment period, account for an error in the original data. The following changes were made:

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Page 26: Table 7
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Page 30: Figures 7 and 8

This does NOT affect the overall outcome of the analysis – that the projects contained in the DRAFT FY2021-2027 TIP and proposed changes to Communities in Motion 2040 2.0 meet air quality conformity requirements for Northern Ada County and will not degrade air quality.

DRAFT Air Quality Conformity Demonstration for the FY2021-2027 DRAFT Regional Transportation Improvement Program and proposed changes to Communities in Motion 2040 2.0.

This document contains the estimated air quality impacts associated with the DRAFT FY2021-2027 TIP and proposed changes to Communities in Motion 2040 2.0. It also contains an emissions budget test for the purposes of demonstrating air quality conformity as per federal requirements. The estimated impacts demonstrate that the projects contained in the DRAFT FY2021-2027 TIP and proposed changes to Communities in Motion 2040 2.0 meet air quality conformity requirements for Northern Ada County and will not degrade air quality.

MOVES Input Files (Updated September 1, 2020, See Above): The following folders contain MOVES input and run files for the FY2021-2027 TIP: Input 2023, Input 2023 No Build, Input 2030, Input 2040, Run files.

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The documents demonstrating conformity for Communities in Motion and recent TIPs are below. Find older conformity demonstration documents in the archives.

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Air Quality Conformity Demonstration for the FY2020-2026 Regional Transportation Improvement Program

This document contains the estimated air quality impacts associated with the FY2020-2026 Transportation Improvement Program for Northern Ada County. It also contains an emissions budget test for the purposes of demonstrating air quality conformity as per federal requirements. The estimated impacts demonstrate that the projects contained in the FY2020-2026 Transportation Improvement Program meet air quality conformity requirements for Northern Ada County and will not degrade air quality.

MOVES Input Files: The following folders contain MOVES input and run files for the FY2020-2026 TIP: Input 2020, Input 2024, Input 2024 No Build, Input 2030, Input 2040, Run files.

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Air Quality Conformity Demonstration for Northern Ada County for Communities in Motion 2040 2.0, regional long-range transportation plan

This document contains the estimated air quality impacts associated with Communities in Motion 2040 2.0. It also contains an emissions budget test for the purposes of demonstrating air quality conformity as per federal requirements. The estimated impacts demonstrate that the projects contained in Communities in Motion 2040 2.0 meet air quality conformity requirements for Northern Ada County.

Federal approval letter (2/1/2019)

MOVES Input Files: The following folders below contain MOVES input files for each budget year in Communities in Motion 2040 2.0: 2019, 2023, 2030, and 2040.

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