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Federal Transportation Conformity

This guide by the Metropolitan Transportation Commission (MTC) provides insights into ensuring transportation plans comply with emissions budgets and timely implementation of Transportation Control Measures. It covers smart growth strategies, effectiveness of TCMs, inter-sector emission trading, and more. The document emphasizes updating plans and SIPs every five years, using mobile source emission factors consistently, and advises on managing conformity lapses effectively.

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Federal Transportation Conformity

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  1. Metropolitan Transportation Commission Federal Transportation Conformity Steve Heminger MTC Executive Director CFEE Conference December 9, 2002

  2. Metropolitan Transportation Commission “Basic Guide for State & Local Officials” Source: U.S. DOT

  3. Metropolitan Transportation Commission Simple Definition • Transportation plans and programs must “conform” to the motor vehicle emissions budget in the SIP • Timely implementation of Transportation Control Measures (TCMs)

  4. Metropolitan Transportation Commission Areas Subject to Transportation Conformity Requirements in California Source: Caltrans

  5. Model Inputs vs. Outputs Source: MTC Regional Transportation Plan, 1998

  6. Metropolitan Transportation Commission Smart Growth Strategy Source: MTC

  7. Metropolitan Transportation Commission Limited Effectiveness of TCMs

  8. Transit Spending as Percent of Funding in Long-Range Transportation Plan

  9. Highway Expansion as Percent of Funding in Long-Range Transportation Plan

  10. Metropolitan Transportation Commission Planning Assumptions and Time Horizon • AMPO Recommendation: Require that transportation plans and SIPs be updated on a staggered schedule every five years and that both plans use the same mobile source emission factors and other modeling assumptions

  11. Metropolitan Transportation Commission Areas Subject to Conformity Lapse or Freeze Source: Caltrans

  12. Metropolitan Transportation Commission Motor Vehicle Emission Budget • AMPO Recommendation: Allow MPOs to use a build/no-build emission reduction test as a possible resource to avoid a conformity lapse while awaiting approval of a new motor vehicle emission budget (MVEB).

  13. Metropolitan Transportation Commission Inter-sector Emission Trading • AMPO Recommendation: Allow MPOs to mitigate an MVEB excess by purchasing offsetting emission reductions from sources other than on-road motor vehicles.

  14. Metropolitan Transportation Commission Vehicle Use vs. Tailpipe Controls Source: Transportation Research Board, 2002

  15. Metropolitan Transportation Commission TCM Substitution • AMPO Recommendation: Allow U.S. DOT to approve a TCM substitution proposed by an MPO as part of any conformity finding on a transportation plan or program.

  16. All SF Bay Area Operators, Percentage Change in Operating Statistics (between 1982/83 and 2000/01)

  17. Metropolitan Transportation Commission

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