NETTCP Environmental Impact & Sustainability in Transportation 2 — Questions and Answers
Question 1: Which federal regulation requires transportation agencies to assess the environmental impacts of major highway projects before approval?
- Clean Air Act Section 108
- National Environmental Policy Act (NEPA) (Correct answer)
- Safe Drinking Water Act
- Resource Conservation and Recovery Act
Correct answer: National Environmental Policy Act (NEPA)
NEPA requires federal agencies to evaluate environmental effects of major projects through Environmental Impact Statements (EIS) or Environmental Assessments (EA).
Question 2: What is the primary purpose of a stormwater retention basin installed near a highway?
- To provide water for roadside vegetation irrigation
- To capture and treat runoff before it enters natural waterways (Correct answer)
- To store water for construction activities
- To reduce road noise for nearby residents
Correct answer: To capture and treat runoff before it enters natural waterways
Retention basins capture stormwater runoff from roadways, allowing pollutants to settle and reducing peak flow rates into natural water bodies.
Question 3: Which greenhouse gas is most directly associated with vehicle tailpipe emissions in transportation?
- Methane (CH4)
- Nitrous oxide (N2O)
- Carbon dioxide (CO2) (Correct answer)
- Sulfur hexafluoride (SF6)
Correct answer: Carbon dioxide (CO2)
CO2 is the dominant greenhouse gas from combustion of fossil fuels in vehicle engines and represents the largest share of transportation emissions.
Question 4: What does the term 'context-sensitive design' mean in sustainable transportation planning?
- Using low-cost materials to reduce project budgets
- Designing infrastructure that fits the surrounding community and natural environment (Correct answer)
- Applying uniform design standards across all road types
- Prioritizing vehicle throughput over all other considerations
Correct answer: Designing infrastructure that fits the surrounding community and natural environment
Context-sensitive design balances transportation needs with community values, natural resources, and aesthetic considerations specific to each project location.
Question 5: In New England, which environmental concern is most closely associated with road salt application during winter maintenance?
- Increased urban heat island effect
- Contamination of freshwater aquifers and wetlands (Correct answer)
- Elevated ground-level ozone concentrations
- Depletion of stratospheric ozone
Correct answer: Contamination of freshwater aquifers and wetlands
Road salt leaches into groundwater and surface water, elevating chloride levels that harm aquatic ecosystems and can contaminate drinking water wells.
Question 6: What is the main environmental benefit of using recycled asphalt pavement (RAP) in road construction?
- It eliminates the need for any new aggregate materials
- It reduces the demand for virgin materials and lowers energy consumption (Correct answer)
- It increases pavement life by 50% compared to standard asphalt
- It prevents stormwater infiltration more effectively
Correct answer: It reduces the demand for virgin materials and lowers energy consumption
RAP reduces the need for new bitumen and aggregate, conserving natural resources and reducing the energy and emissions associated with producing virgin materials.
Question 7: Which air pollutant from diesel vehicles is most strongly linked to particulate matter (PM2.5) formation and respiratory health impacts?
- Carbon monoxide (CO)
- Volatile organic compounds (VOCs)
- Diesel exhaust particles and black carbon (Correct answer)
- Ground-level ozone
Correct answer: Diesel exhaust particles and black carbon
Diesel exhaust contains fine particles and black carbon that directly form PM2.5, which penetrates deep into lung tissue and causes significant health effects.
NETTCP Environmental Impact & Sustainability in Transportation 2
Which federal regulation requires transportation agencies to assess the environmental impacts of major highway projects before approval?