PT143.S4.Q12 > Question

SECTION 1 · lr

Question 1 Question 2 Question 3 Question 4 Question 5 Question 6 Question 7 Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14 Question 15 Question 16 Question 17 Question 18 Question 19 Question 20 Question 21 Question 22 Question 23 Question 24 Question 25

SECTION 2 · rc

PASSAGE 1

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

PASSAGE 2

Question 8 Question 9 Question 10 Question 11 Question 12 Question 13 Question 14

PASSAGE 3

Question 15 Question 16 Question 17 Question 18 Question 19 Question 20

PASSAGE 4

Question 21 Question 22 Question 23 Question 24 Question 25 Question 26 Question 27

SECTION 3 · lr

SECTION 4 · lr

Why did rush-hour travel times decrease after the rush-hour speed limit on the British M25 motorway was lowered?

The correct answer will be a hypothesis that explains a key difference between traveling on the British M25 motorway during rush-hour at a lower speed and traveling at a higher speed. That difference must result in shorter travel time when traveling at a lower speed.

We aren’t concerned with whether average speed is lower at rush-hour than at other times of day. We’re only concerned with rush-hour travel times and why those times decreased even though the speed limit also decreased.

Like (A), we are only concerned with rush-hour travel times and why those travel times increased after the rush-hour speed limit was lowered. Also, it shouldn’t be surprising that the change in rush-hour speed limit did not affect travel times during periods other than rush-hour.

This explains the key difference between driving on the M25 during rush-hour at a lower speed versus a higher speed. Driving faster led to more accidents, which caused longer travel times. When the speed limit was lowered, there were fewer accidents and shorter travel times.

The fact that the speed limit was rigorously enforced both before and after it was lowered only shows us that people probably drove at the correct speed, whether 50 mph or 70 mph. The question still remains: why did travel times decrease after the speed limit was lowered?

This could simply mean that the number of people on the M25 stayed the same before and after the rush-hour speed limit was lowered. Thus, it doesn’t help to explain why travel times decreased after the speed limit was lowered.

PrepTest 143 - Section 4 - Question 12

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