MTO Environmental Sustainability & Transportation 4 — Questions and Answers
Question 1: What is a major environmental benefit of shifting freight from truck to rail?
- Rail is faster and reduces delivery times
- Rail produces significantly fewer emissions per ton-mile than trucks (Correct answer)
- Rail eliminates the need for highway maintenance
- Rail freight requires no packaging materials
Correct answer: Rail produces significantly fewer emissions per ton-mile than trucks
Freight rail produces approximately 75% less greenhouse gas emissions per ton-mile than trucking, making modal shifts a key strategy for reducing freight sector emissions.
Question 2: What environmental problem is associated with road salt used for winter highway maintenance?
- It corrodes vehicle engines prematurely
- It contaminates nearby streams, lakes, and groundwater with chloride (Correct answer)
- It causes pavement to crack faster
- It reduces visibility during snowstorms
Correct answer: It contaminates nearby streams, lakes, and groundwater with chloride
Road salt runoff introduces chloride ions into water bodies, harming aquatic ecosystems and potentially contaminating drinking water sources.
Question 3: Which US agency sets fuel economy standards (CAFE standards) for vehicles?
- Federal Highway Administration (FHWA)
- National Highway Traffic Safety Administration (NHTSA) (Correct answer)
- Environmental Protection Agency (EPA)
- Department of Energy (DOE)
Correct answer: National Highway Traffic Safety Administration (NHTSA)
NHTSA sets Corporate Average Fuel Economy (CAFE) standards that require automakers to meet minimum average fuel efficiency across their vehicle fleets.
Question 4: What is the purpose of a 'Transportation Conformity' determination under the Clean Air Act?
- To ensure vehicles meet emissions inspection standards
- To verify that transportation plans won't worsen air quality in nonattainment areas (Correct answer)
- To certify that transit agencies follow federal safety rules
- To confirm that road materials meet federal specifications
Correct answer: To verify that transportation plans won't worsen air quality in nonattainment areas
Transportation conformity ensures that federally funded transportation plans and projects in air quality nonattainment areas will not cause or contribute to new air quality violations.
Question 5: How do electric vehicles (EVs) reduce transportation's environmental impact even when charged with grid electricity?
- EVs produce no emissions under any circumstances
- EVs are more efficient than combustion engines, reducing total energy use and emissions even with imperfect grid power (Correct answer)
- EVs eliminate all transportation noise pollution
- EVs require no road infrastructure, reducing pavement impacts
Correct answer: EVs are more efficient than combustion engines, reducing total energy use and emissions even with imperfect grid power
Even when charged from a grid that includes fossil fuels, EVs are typically cleaner than gasoline vehicles due to greater drivetrain efficiency and the grid's improving renewable energy mix.
Question 6: What does a 'multimodal' transportation network contribute to environmental sustainability?
- It requires more infrastructure, increasing environmental impact
- It gives travelers options beyond driving, reducing car trips and emissions (Correct answer)
- It focuses transportation investment on highways only
- It standardizes vehicle types across all modes
Correct answer: It gives travelers options beyond driving, reducing car trips and emissions
Multimodal networks integrate transit, walking, cycling, and driving so that travelers can choose lower-emission options, collectively reducing vehicle miles traveled.
Question 7: What environmental issue do roadway stormwater retention ponds primarily address?
- Reducing traffic noise near residential areas
- Capturing and treating polluted runoff before it enters natural waterways (Correct answer)
- Providing wildlife habitat along highway corridors
- Cooling pavement surfaces during hot weather
Correct answer: Capturing and treating polluted runoff before it enters natural waterways
Retention ponds capture stormwater runoff from roads that contains oil, heavy metals, and other pollutants, allowing sediment to settle and pollutants to break down before water is released.
MTO Environmental Sustainability & Transportation 4
What is a major environmental benefit of shifting freight from truck to rail?