N.M. Admin. Code § 20.11.3.122

Current through Register Vol. 35, No. 23, December 10, 2024

Section 20.11.3.122 - PROCEDURES FOR DETERMINING REGIONAL TRANSPORTATION-RELATED EMISSIONS

A. General requirements:

(1) The regional emissions analysis required by 20.11.3.118 NMAC and 20.11.3.119 NMAC for the transportation plan, TIP or project not from a conforming plan and TIP shall include all regionally significant projects expected in the nonattainment or maintenance area. The analysis shall include FHWA/FTA projects proposed in the transportation plan and TIP and all other regionally significant projects which are disclosed to the MPO as required by 20.11.3.105 NMAC. Projects which are not regionally significant are not required to be explicitly modeled, but vehicle miles traveled (VMT) from such projects shall be estimated in accordance with reasonable professional practice and shall be reviewed by the TCTC as part of the interagency consultation described in Paragraph (1) of Subsection D of 20.11.3.105 NMAC. The effects of TCMs and similar projects that are not regionally significant may also be estimated in accordance with reasonable professional practice and shall be reviewed by the TCTC as part of the interagency consultation described in Paragraph (1) of Subsection D of 20.11.3.105 NMAC.

(2) The emissions analysis may not include for emissions reduction credit any TCMs or other measures in the applicable implementation plan which have been delayed beyond the scheduled date(s) until such time as their implementation has been assured. If the measure has been partially implemented and it can be demonstrated that it is providing quantifiable emission reduction benefits, the emissions analysis may include that emissions reduction credit.

(3) Emissions reduction credit from projects, programs or activities which require a regulatory action in order to be implemented may not be included in the emissions analysis unless:

(a) the regulatory action is already adopted by the enforcing jurisdiction;

(b) the project, program or activity is included in the applicable implementation plan;

(c) the control strategy implementation plan submission or maintenance plan submission that establishes the motor vehicle emissions budget(s) for the purposes of 20.11.3.118 NMAC contains a written commitment to the project, program or activity by the agency with authority to implement it; or

(d) EPA has approved an opt-in to a federally enforced program, EPA has promulgated the program (if the control program is a federal responsibility, such as vehicle tailpipe standards), or the Clean Air Act requires the program without need for individual state action and without any discretionary authority for EPA to set its stringency, delay its effective date or not implement the program.

(4) Emissions reduction credit from control measures that are not included in the transportation plan and TIP and that do not require a regulatory action in order to be implemented may not be included in the emissions analysis unless the conformity determination includes written commitments to implementation from the appropriate entities.

(a) Persons or entities voluntarily committing to control measures shall comply with the obligations of such commitments.

(b) The conformity implementation plan revision required in 40 CFR 51.390 shall provide that written commitments to control measures that are not included in the transportation plan and TIP shall be obtained prior to a conformity determination and that such commitments shall be fulfilled.

(5) A regional emissions analysis for the purpose of satisfying the requirements of 20.11.3.119 NMAC shall make the same assumptions in both the baseline and "action" scenarios regarding control measures that are external to the transportation system itself, such as vehicle tailpipe or evaporative emission standards, limits on gasoline volatility, vehicle inspection and maintenance programs, and oxygenated or reformulated gasoline or diesel fuel.

(6) The ambient temperatures used for the regional emissions analysis shall be consistent with those used to establish the emissions budget in the applicable implementation plan. All other factors, for example the fraction of travel in a hot stabilized engine mode, shall be consistent with the applicable implementation plan, unless modified after interagency consultation according to Subparagraph (a) of Paragraph (1) of Subsection D of 20.11.3.105 NMAC to incorporate additional or more geographically specific information or represent a logically estimated trend in such factors beyond the period considered in the applicable implementation plan.

(7) Reasonable methods shall be used to estimate nonattainment or maintenance area VMT on off-network roadways within the urban transportation planning area, and on roadways outside the urban transportation planning area.

B. Regional emissions analysis in serious, severe and extreme ozone nonattainment areas and serious CO nonattainment areas shall meet the requirements of Paragraphs (1) through (3) of Subsection B of 20.11.3.122 NMAC if their metropolitan planning area contains an urbanized area population over 200,000.

(1) By January 1, 1997, estimates of regional transportation-related emissions used to support conformity determinations shall be made at a minimum using network-based travel models according to procedures and methods that are available and in practice and supported by current and available documentation. These procedures, methods and practices are available from DOT and shall be updated periodically. Agencies shall discuss these modeling procedures and practices through the interagency consultation process as required by Subparagraph (a) of Paragraph (1) of Subsection D of 20.11.3.105 NMAC. Network-based travel models shall at a minimum satisfy the following requirements:

(a) network-based travel models shall be validated against observed counts (peak and off-peak, if possible) for a base year that is not more than 10 years prior to the date of the conformity determination; model forecasts shall be analyzed for reasonableness and compared to historical trends and other factors, and the results shall be documented;

(b) land use, population, employment and other network-based travel model assumptions shall be documented and based on the best available information; future speeds shall be determined through interagency consultation as described in Paragraph (1) of Subsection D of 20.11.3.105 NMAC;

(c) scenarios of land development and use shall be consistent with the future transportation system alternatives for which emissions are being estimated; the distribution of employment and residences for different transportation options shall be reasonable;

(d) a capacity-sensitive assignment methodology shall be used, and emissions estimates shall be based on a methodology which differentiates between peak and off-peak link volumes and speeds and uses speeds based on final assigned volumes;

(e) zone-to-zone travel impedances used to distribute trips between origin and destination pairs shall be in reasonable agreement with the travel times that are estimated from final assigned traffic volumes and shall be determined through interagency consultation described in Paragraph (1) of Subsection D of 20.11.3.105 NMAC; where use of transit currently is anticipated to be a significant factor in satisfying transportation demand, these times shall also be used for modeling mode splits; and

(f) network-based travel models shall be reasonably sensitive to changes in the time(s), cost(s) and other factors affecting travel choices.

(2) Reasonable methods in accordance with good practice shall be used to estimate traffic speeds and delays in a manner that is sensitive to the estimated volume of travel on each roadway segment represented in the network-based travel model.

(3) Highway performance monitoring system (HPMS) estimates of vehicle miles traveled (VMT) shall be considered the primary measure of VMT within the portion of the nonattainment or maintenance area and for the functional classes of roadways included in HPMS, for urban areas which are sampled on a separate urban area basis. For areas with network-based travel models, a factor (or factors) may be developed to reconcile and calibrate the network-based travel model estimates of VMT in the base year of its validation to the HPMS estimates for the same period. These factors may then be applied to model estimates of future VMT. In this factoring process, consideration shall be given to differences between HPMS and network-based travel models, such as differences in the facility coverage of the HPMS and the modeled network description. Locally developed count-based programs and other departures from these procedures are permitted subject to the interagency consultation procedures Subparagraph (a) of Paragraph (1) of Subsection D of 20.11.3.105 NMAC.

C. Two-year grace period for regional emissions analysis requirements in certain ozone and CO areas: The requirements of Subsection B of 20.11.3.122 NMAC apply to such areas or portions of such areas that have not previously been required to meet these requirements for any existing NAAQS two years from the following:

(1) the effective date of EPA's reclassification of an ozone or CO nonattainment area that has an urbanized area population greater than 200,000 to serious or above;

(2) the official notice by the census bureau that determines the urbanized area population of a serious or above ozone or CO nonattainment area to be greater than 200,000; or

(3) the effective date of EPA's action that classifies a newly designated ozone or CO nonattainment area that has an urbanized area population greater than 200,000 as serious or above.

D. In all areas not otherwise subject to Subsection B of 20.11.3.122 NMAC, regional emissions analyses shall use those procedures described in Subsection B of 20.11.3.122 NMAC if the use of those procedures has been the previous practice of the MPO. Otherwise, areas not subject to Subsection B of 20.11.3.122 NMAC may estimate regional emissions using any appropriate methods that account for VMT growth by, for example, extrapolating historical VMT or projecting future VMT by considering growth in population and historical growth trends for VMT per person. These methods shall also consider future economic activity, transit alternatives and transportation system policies.

E. PM₁₀ from construction-related fugitive dust:

(1) For areas in which the implementation plan does not identify construction-related fugitive PM₁₀ as a contributor to the nonattainment problem, the fugitive PM₁₀ emissions associated with highway and transit project construction are not required to be considered in the regional emissions analysis.

(2) In PM₁₀ nonattainment and maintenance areas with implementation plans that identify construction-related fugitive PM₁₀ as a contributor to the nonattainment problem, the regional PM₁₀ emissions analysis shall consider construction-related fugitive PM₁₀ and shall account for the level of construction activity, the fugitive PM₁₀ control measures in the applicable implementation plan and the dust-producing capacity of the proposed activities.

F. PM_2.5 from construction-related fugitive dust:

(1) For PM_2.5 areas in which the implementation plan does not identify construction-related fugitive PM_2.5 as a significant contributor to the nonattainment problem, the fugitive PM_2.5 emissions associated with highway and transit project construction are not required to be considered in the regional emissions analysis.

(2) In PM_2.5 nonattainment and maintenance areas with implementation plans that identify construction-related fugitive PM_2.5 as a significant contributor to the nonattainment problem, the regional PM_2.5 emissions analysis shall consider construction-related fugitive PM_2.5 and shall account for the level of construction activity, the fugitive PM_2.5 control measures in the applicable implementation plan, and the dust-producing capacity of the proposed activities.

G. Reliance on previous regional emissions analysis:

(1) Conformity determinations for a new transportation plan or TIP may be demonstrated to satisfy the requirements of 20.11.3.118 NMAC, Criteria and Procedures: Motor Vehicle Emissions Budget, or 20.11.3.119 NMAC, Criteria and Procedures: Interim Emissions in Areas Without Motor Vehicle Emissions Budgets, without new regional emissions analysis if the previous regional emissions analysis also applies to the new plan or TIP. This requires a demonstration that:

(a) the new plan or TIP contains all projects that shall be started in the TIP's time frame in order to achieve the highway and transit system envisioned by the transportation plan;

(b) all plan and TIP projects that are regionally significant are included in the transportation plan with design concept and scope adequate to determine their contribution to the transportation plan's or TIP's regional emissions at the time of the previous conformity determination;

(c) the design concept and scope of each regionally significant project in the new plan or TIP are not significantly different from that described in the previous transportation plan; and

(d) the previous regional emissions analysis is consistent with the requirements of 20.11.3.118 NMAC (including that conformity to all currently applicable budgets is demonstrated) or 20.11.3.119 NMAC, as applicable.

(2) A project which is not from a conforming transportation plan and a conforming TIP may be demonstrated to satisfy the requirements of 20.11.3.118 NMAC or 20.11.3.119 NMAC without additional regional emissions analysis if allocating funds to the project shall not delay the implementation of projects in the transportation plan or TIP which are necessary to achieve the highway and transit system envisioned by the transportation plan the previous regional emissions analysis is still consistent with the requirements of 20.11.3.118 NMAC (including that conformity to all currently applicable budgets is demonstrated) or 20.11.3.119 NMAC, as applicable, and if the project is either:

(a) not regionally significant; or

(b) included in the conforming transportation plan (even if it is not specifically included in the latest conforming TIP) with design concept and scope adequate to determine its contribution to the transportation plan's regional emissions at the time of the transportation plan's conformity determination, and the design concept and scope of the project is not significantly different from that described in the transportation plan.

(3) A conformity determination that relies on Subsection G of 20.11.3.122 NMAC does not satisfy the frequency requirements of Subsection B or Subsection C of 20.11.3.104 NMAC.

N.M. Admin. Code § 20.11.3.122

20.11.3.122 NMAC - Rn & A, 20.11.3.219 NMAC, 11/15/10