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Environmental Impact & Sustainability Flashcards

6 cards from real CTE practice questions. Tap to flip, then mark Knew It or Still Learning โ€” missed cards come back until you master them.

Read the first 6 Environmental Impact & Sustainability flashcards as text
  1. The FHWA highway traffic noise model used for noise impact assessments is called:

    Answer: TNM (Traffic Noise Model)

    The FHWA Traffic Noise Model (TNM) is the agency's approved computer model for predicting highway traffic noise levels and evaluating the feasibility and reasonableness of noise barriers.

  2. At what noise level (Leq) does FHWA consider a highway noise impact to occur for Category C land use (residential)?

    Answer: 67 dB(A)

    FHWA's noise abatement criteria establish 67 dB(A) Leq as the impact threshold for Category C land uses, which include residences and similar noise-sensitive outdoor areas.

  3. What is the purpose of an 'alternatives analysis' in a highway EIS under NEPA?

    Answer: To evaluate a range of reasonable alternatives including the no-build alternative

    NEPA requires an EIS to rigorously evaluate a reasonable range of alternatives, including the no-build alternative, to inform decision-makers and the public about tradeoffs.

  4. Which greenhouse gas is the primary concern from mobile source emissions in the transportation sector?

    Answer: Carbon dioxide (CO2)

    Carbon dioxide (CO2) from combustion of gasoline and diesel fuels is the dominant greenhouse gas from the transportation sector, accounting for the largest share of US transport GHG emissions.

  5. What does 'environmental justice' require in federally funded transportation planning?

    Answer: Identifying and addressing disproportionately high adverse effects on minority and low-income populations

    Executive Order 12898 requires federal agencies to identify and address disproportionately high and adverse human health or environmental effects on minority and low-income populations.

  6. What is a 'categorical exclusion' (CE) in the NEPA process for transportation projects?

    Answer: An action that does not individually or cumulatively significantly affect the environment

    A CE is a NEPA determination that a category of actions does not have significant environmental effects, allowing projects to proceed without an EA or EIS.