PT147.S1.Q1 > Question

SECTION 1 · lr

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SECTION 2 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7

PASSAGE 2

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SECTION 3 · rc

PASSAGE 1

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6

PASSAGE 2

Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13

PASSAGE 3

Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21

PASSAGE 4

Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 4 · lr

The new electronic tolling system reduced delays on the highway, which decreased travel times and consequently lowered pollution levels per trip, but the total air pollution on the highway did not decrease measurably.

The correct answer will describe some other factor or phenomenon that also began when the tolls changed, but which caused increased pollution on the highway. That increase must offset the decrease from the shortened trip times, yielding essentially constant pollution levels as described in the stimulus.

This would likely cause fewer people to take the highway, leading to further decreased pollution levels. We’re looking for something that would cause heightened pollution to counteract the decrease from the shortened trip times, so this does the opposite of what we need.

This answer doesn’t give us a factor that helps explain the constant pollution levels. The stimulus tells us that the average trip length decreased with the toll method switch, which remains true even if some trips are impacted by long delays.

This explains why the pollution level on the highway remains the same despite the fact that the average pollution per trip went down: the shortened trip times attracted more drivers, so even though each trip produces less pollution on average, there are now more trips overall.

Even if shorter-distance trips did not become markedly faster, we know that trips on the highway did on average. We would therefore still expect to see lowered pollution levels based on this answer and the stimulus alone, so this doesn’t help reconcile the issue at hand.

This answer doesn’t give us a factor that helps explain the constant pollution levels. The stimulus tells us that the switch to the electronic system had an impact on average trip times, whether or not every driver utilized the new system.

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