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Transportation Performance Management

 

State On-Road Mobile Source Emissions Reductions Report - Texas

The information below summarizes the TPM On-Road Mobile Source Emissions Reductions performance measure. Per 23 CFR 490, State Departments of Transportation (DOTs) are required to establish 2- and 4-year targets for this measure. The targets should represent the anticipated condition/performance at the mid-point and end of the 4-year performance period. State DOTs establish targets at the beginning of each 4-year performance period, and report on progress every two years. When establishing targets, State DOTs have the flexibility to use the methodology they deem most appropriate. FHWA encourages States to review data sets and trends and consider factors that may affect targets. Performance targets should be data-driven, realistic, and attainable and should align with the performance management framework and legislative intent.

The targets and discussion of basis for targets, optional adjustment of targets, progress, and planned activities were provided by the State DOT in its most recent biennial performance report. FHWA has not edited this information. It is provided to help bring context to the State DOT’s performance targets and progress. Any questions about the information should be directed to the State DOT.

Data reported by State DOTs was collected in the previous year, representing the condition/performance at the time of collection. Thus, in the tables and graphs below, FHWA labels data with the year representing the condition/performance, rather than the year the data was reported. The same thing is done for the targets--the year represents when the corresponding actual condition/performance data will be collected, not reported. More Information.

Total Emission Reduction Measure is the 2-year and 4-year cumulative estimated emission reductions, for all CMAQ funded projects, of each applicable criteria pollutant (ozone (O3), carbon monoxide (CO), and particulate matter (PM2.5 and PM10)) and precursor (volatile organic compounds (VOC) and oxides of nitrogen (NOx)) for which the area is designated nonattainment or maintenance (23 CFR 490.807). See the example below:

  • The 2021 baseline presents the cumulative 4-year emissions reductions in the baseline period from Fiscal Year (FY) 2018 through FY2021 as provided by the state DOT in the Baseline Performance Period Report.
  • The 2023 actual presents the cumulative 2-year emissions reductions from FY2022-FY2023 as provided in the CMAQ Public Access System.
  • The 2023 target presents the state-selected target of expected cumulative 2-year emissions reductions from the midperiod performance period FY2022-FY2023
  • The 2025 actual presents the cumulative 4-year emissions reductions from FY2022-FY2025 as provided in the CMAQ Public Access System
  • The 2025 target presents the state-selected target of expected cumulative 4-year emissions reductions from the full performance period FY2022-FY025.

The CMAQ Public Access System (PAS) and associated annual CMAQ project reporting process make available searchable CMAQ project information from 1992 to present. These data were used for other, non-performance management purposes during the fiscal years before FY 2018. In 2015, FHWA made changes to the CMAQ database to accommodate legislative amendments to title 23, U.S.C. (see 23 U.S.C. 149(i)(1)), and to improve functionality. State-level baseline emissions reductions calculations for FY 2014-2017 may vary from PAS-reported values for a number of reasons, such as change in nonattainment/maintenance area status within the baseline period, individual project data entry errors, and other state-level modifications. Future performance calculations are expected to have increased consistency with the application of PAS data for performance management beginning in FY2018.

  • Emissions Reductions for PM10 through CMAQ Projects

    • Trend through 2025

      Desired trend: ↑

      Texas Emissions (kg/day) Reduced


  • Emissions Reductions for PM10 through CMAQ Projects 2021 2022 2023 2024 2025
    Condition/Performance 20.652 -- -- -- --
    Targets -- -- 4.540 -- 8.900

  • Basis for Emissions Reductions for PM10 through CMAQ Projects

    The methodology compares CMAQ project emissions from the FHWA User Profile and Access Control System (UPACS) and the EPMPO Transportation Improvement Program (TIP) over the past 4-years to develop targets for the future 4-year CMAQ program. The emission benefits for the projects in current TIP are lower than those from the last performance reporting period. Also, several past projects were duplicates in the UPACS system at the time, which contributed to a greater anticipated emissions reduction. As such, the targets for the 2nd performance period are lower than the targets for the 1st performance period. New targets will be re-evaluated at the mid-performance period report.

  • Data Sources:
    Texas 2022 Biennial Performance Reports
    CMAQ Public Access System

  • Emission Reductions for NOx through CMAQ Projects

    • Trend through 2025

      Desired trend: ↑

      Texas Emissions (kg/day) Reduced


  • Emission Reductions for NOx through CMAQ Projects 2021 2022 2023 2024 2025
    Condition/Performance 12472.915 -- -- -- --
    Targets -- -- 2679.641 -- 5015.745

  • Emission Reductions for NOx through CMAQ Projects

    Targets are based on a variety of methodologies and data. Methodologies include those published in the Texas Guide to Accepted Mobile Source Emission Reduction Strategies (MOSERS), analysis of past emissions reductions, traffic demand modeling, and analyzing the emissions reductions realized on past projects compared to what is planned ahead.

    NCTCOG coordinates with local stakeholders and TxDOT in selection of CMAQ projects for deployment in the Dallas-Fort Worth ozone nonattainment area. These projects are selected to meet the program goals of reducing congestion and/or reducing emissions of ozone precursor pollutants. Emissions reductions estimates for these projects are developed by NCTCOG using methodologies published in the MOSERS guide. In cases where no practical MOSERS methodology exists, verified past emission reduction performance is used to create an emissions reduction estimate.

    For the second performance period – years 2022, 2023, 2024, and 2025 – NCTCOG coordinated with TxDOT to establish targets for the CMAQ traffic congestion and on-road emissions measures. To develop the 2 and 4 year targets, staff analyzed the behavior of emissions factors over time and applied percentage reductions to the emissions benefits for all years to better correlate with potential future reductions. H-GAC staff has developed a revised methodology to develop the air quality performance measures for the second performance measure cycle. This methodology uses emission reduction estimates from planned TIP projects from 2022 through 2025 to develop a base estimate of 2 and 4 year targets, then applies a “project delivery success rate” to the base estimate to determine the final 2 and 4 year targets.

    The project delivery success rate is developed by comparing the planned emission reductions from the beginning of the previous 2018-2021 performance period cycle with the actual emission reductions recorded for funded projects over the same period. Applying this ratio helps to account for challenges in moving programmed TIP project towards receiving final federal obligation; a problem that resulted in difficulties meeting our region’s goals during the first performance period cycle. AAMPO’s 2 and 4 year targets for emissions reductions were calculated by considering the distribution of CMAQ projects throughout the FY 2023-2026 TIP along with (which as of publication is subject to federal approval) the ratio of projects successfully let in FY 2022 to determine a reasonable scenario for emission reduction in the 2 and 4 year performance reporting timeframes. Several considerations went into this approach, including the high degree of variation in benefits between projects, the large majority of projects being programmed for FY 2022 and 2023 compared to later years, and a low sample size of projects between FY 2020 and FY 2022 making it difficult to project a reasonable ratio of benefits realized in UPACS reporting vs TIP programming. AAMPO has determined to use the average number of CMAQ projects expected to let in 2022 versus what was originally programmed, yielding a value of 58.3 percent. Since most projects are in the first 2 years of the reporting period, it is assumed approximately 58.3 percent of projects will let by the end of 2023, and for the remainder to be realized by the end of the 4-year performance period in 2025. It should be noted that the 2- and 4-year targets are cumulative, excluding the baseline. The 2-year target will include the first 58.3 percent of NOx and VOC benefits, totaling 127.75 and 53.97 kg/day, respectively. AAMPO will have the opportunity to adjust this target at the 2-year mark and will work with state and local partners to coordinate the reporting and project delivery of CMAQ projects to better understand how the emissions reduction metric can be improved.

  • Data Sources:
    Texas 2022 Biennial Performance Reports
    CMAQ Public Access System

  • Emissions Reductions for CO through CMAQ Projects

    • Trend through 2025

      Desired trend: ↑

      Texas Emissions (kg/day) Reduced


  • Emissions Reductions for CO through CMAQ Projects 2021 2022 2023 2024 2025
    Condition/Performance 824.635 -- -- -- --
    Targets -- -- 175.750 -- 367.100

  • Emissions Reductions for CO through CMAQ Projects

    The methodology compares CMAQ project emissions from the FHWA User Profile and Access Control System (UPACS) and the EPMPO Transportation Improvement Program (TIP) over the past 4-years to develop targets for the future 4-year CMAQ program. Due to the resulting emission benefits for the projects in future TIP years, the targets for the 2nd performance period are lower than the targets set for the 1st performance period. These targets will be re-evaluated at the mid-performance period report.

  • Data Sources:
    Texas 2022 Biennial Performance Reports
    CMAQ Public Access System

  • Emissions Reductions for VOC through CMAQ Projects

    • Trend through 2025

      Desired trend: ↑

      Texas Emissions (kg/day) Reduced


  • Emissions Reductions for VOC through CMAQ Projects 2021 2022 2023 2024 2025
    Condition/Performance 2536.829 -- -- -- --
    Targets -- -- 723.809 -- 1301.270

  • Emissions Reductions for VOC through CMAQ Projects

    Targets are based on a variety of methodologies and data. Methodologies include those published in the Texas Guide to Accepted Mobile Source Emission Reduction Strategies (MOSERS), analysis of past emissions reductions, traffic demand modeling, and analyzing the emissions reductions realized on past projects compared to what is planned ahead.

    NCTCOG coordinates with local stakeholders and TxDOT in selection of CMAQ projects for deployment in the Dallas-Fort Worth ozone nonattainment area. These projects are selected to meet the program goals of reducing congestion and/or reducing emissions of ozone precursor pollutants. Emissions reductions estimates for these projects are developed by NCTCOG using methodologies published in the MOSERS guide. In cases where no practical MOSERS methodology exists, verified past emission reduction performance is used to create an emissions reduction estimate.

    For the second performance period – years 2022, 2023, 2024, and 2025 – NCTCOG coordinated with TxDOT to establish targets for the CMAQ traffic congestion and on-road emissions measures. To develop the 2 and 4 year targets, staff analyzed the behavior of emissions factors over time and applied percentage reductions to the emissions benefits for all years to better correlate with potential future reductions. H-GAC staff has developed a revised methodology to develop the air quality performance measures for the second performance measure cycle. This methodology uses VOC emission reduction estimates from planned TIP projects from 2022 through 2025 to develop a base estimate of 2 and 4 year targets, then applies a “project delivery success rate” to the base estimate to determine the final 2 and 4 year targets.

    The project delivery success rate is developed by comparing the planned emission reductions from the beginning of the previous 2018-2021 performance period cycle with the actual emission reductions recorded for funded projects over the same period. Applying this ratio helps to account for challenges in moving programmed TIP project towards receiving final federal obligation; a problem that resulted in difficulties meeting our region’s goals during the first performance period cycle. AAMPO’s 2 and 4 year targets for emissions reductions were calculated by considering the distribution of CMAQ projects throughout the FY 2023-2026 TIP along with (which as of publication is subject to federal approval) the ratio of projects successfully let in FY 2022 to determine a reasonable scenario for emission reduction in the 2 and 4 year performance reporting timeframes. Several considerations went into this approach, including the high degree of variation in benefits between projects, the large majority of projects being programmed for FY 2022 and 2023 compared to later years, and a low sample size of projects between FY 2020 and FY 2022 making it difficult to project a reasonable ratio of benefits realized in UPACS reporting vs TIP programming. AAMPO has determined to use the average number of CMAQ projects expected to let in 2022 versus what was originally programmed, yielding a value of 58.3 percent. Since most projects are in the first 2 years of the reporting period, it is assumed approximately 58.3 percent of projects will let by the end of 2023, and for the remainder to be realized by the end of the 4-year performance period in 2025. It should be noted that the 2- and 4-year targets are cumulative, excluding the baseline. The 2-year target will include the first 58.3 percent of NOx and VOC benefits, totaling 127.75 and 53.97 kg/day, respectively. AAMPO will have the opportunity to adjust this target at the 2-year mark and will work with state and local partners to coordinate the reporting and project delivery of CMAQ projects to better understand how the emissions reduction metric can be improved. Also, AAMPO has decided to exclude three projects with a high level of VOC reduction in order to fairly reflect the emissions that will be eventually reported; these projects are currently undergoing a rescope and will most likely report a lower amount of VOC benefit.

  • Data Sources:
    Texas 2022 Biennial Performance Reports
    CMAQ Public Access System

Updated: 12/06/2023
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