Ariz. Admin. Code § 18-2-1418

Current through Register Vol. 30, No. 50, December 13, 2024

Section R18-2-1418 - Criteria and Procedures: Motor Vehicle Emissions Budget (Transportation Plan)

A. The transportation plan shall be consistent with the motor vehicle emissions budget in the applicable implementation plan or implementation plan submission. This criterion applies during the transitional period and the control strategy and maintenance periods, except as provided in R18-2-1436. This criterion may be satisfied if the requirements in subsections (B) and (C) are met:

B. A regional emissions analysis shall be performed as follows:

1. The regional analysis shall estimate emissions of any of the following pollutants and pollutant precursors for which the area is in nonattainment or maintenance and for which the applicable implementation plan or implementation plan submission establishes an emissions budget:

a. VOC as an ozone precursor.

b. NOx as an ozone precursor, unless the Administrator determines that additional reductions of NOx would not contribute to attainment.

c. CO.

d. PM₁₀ (and its precursors VOC or NOx if the applicable implementation plan or implementation plan submission identifies transportation-related precursor emissions within the nonattainment area as a significant contributor to the PM₁₀ nonattainment problem or establishes a budget for such emissions).

e. NOx (in NO₂ nonattainment or maintenance areas).

2. The regional emissions analysis shall estimate emissions from the entire transportation system, including all regionally significant transportation projects contained in the transportation plan and all other regionally significant highway and transit projects expected in the nonattainment or maintenance area in the time-frame of the transportation plan.

3. The emissions analysis methodology shall meet the requirements of R18-2-1430.

4. For areas with a transportation plan that meets the content requirements of R18-2-1406(A), the emissions analysis shall be performed for each horizon year. Emissions in milestone years which are between the horizon years may be determined by interpolation.

5. For areas with a transportation plan that does not meet the content requirements of R18-2-1406(A), the emissions analysis shall be performed for all of the following:

a. The last year of the plan's forecast period.

b. The attainment year, if the attainment year is in the time span of the transportation plan.

c. Any other years in the time span of the transportation plan such that there is not a gap of more than 10 years between analysis years. Emissions in milestone years which are between these analysis years may be determined by interpolation.

C. The regional emissions analysis shall demonstrate that for each of the applicable pollutants or pollutant precursors in subsection (B)(1) the emissions are less than or equal to the motor vehicle emissions budget as established in the applicable implementation plan or implementation plan submission as follows:

1. If the applicable implementation plan or implementation plan submission establishes emissions budgets for milestone years, emissions in each milestone year are less than or equal to the motor vehicle emissions budget established for that year.

2. For nonattainment areas, emissions in the attainment year are less than or equal to the motor vehicle emissions budget established in the applicable implementation plan or implementation plan submission for that year.

3. For nonattainment areas, emissions in each analysis or horizon year after the attainment year are less than or equal to the motor vehicle emissions budget established by the applicable implementation plan or implementation plan submission for the attainment year. If emissions budgets are established for years after the attainment year, emissions in each analysis year or horizon year shall be less than or equal to the motor vehicle emissions budget for that year, if any, or the motor vehicle emissions budget for the most recent budget year prior to the analysis year or horizon year.

4. For maintenance areas, emissions in each analysis or horizon year are less than or equal to the motor vehicle emissions budget established by the maintenance plan for that year, if any, or the emissions budget for the most recent budget year prior to the analysis or horizon year.

Ariz. Admin. Code § R18-2-1418

Adopted effective June 15, 1995 (Supp. 95-2).