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16 Sep 2014, 01:59
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Along Highway 1, traffic is very tightly controlled by traffic lights placed every half mile to cut down on speeding. Motor vehicle accidents, however, are more common along Highway 1 than on any other road in the city. Clearly, this problem can only be solved by adding more traffic lights to the highway, reducing speeding even more.
Which of the following, if true, casts the most doubt on the effectiveness of the solution proposed above?
A. The average speed on Highway 1 is already 35 miles per hour, making more traffic lights unnecessary.
B. The city council does not have sufficient funds budgeted for improvements along Highway 1.
C. Highway 1 is the longest road in the city, making motor vehicle accidents statistically more likely.
D. Most motor vehicle accidents along Highway 1 are rear-end collisions that occur when one of the parties is unable to stop safely at a traffic light.
E. There are more traffic-light controlled intersections on Highway 1 than there are on- and off-ramps.
Which of the following, if true, casts the most doubt on the effectiveness of the solution proposed above?
A. The average speed on Highway 1 is already 35 miles per hour, making more traffic lights unnecessary.
B. The city council does not have sufficient funds budgeted for improvements along Highway 1.
C. Highway 1 is the longest road in the city, making motor vehicle accidents statistically more likely.
D. Most motor vehicle accidents along Highway 1 are rear-end collisions that occur when one of the parties is unable to stop safely at a traffic light.
E. There are more traffic-light controlled intersections on Highway 1 than there are on- and off-ramps.
16 Sep 2014, 01:59
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Official Solution:
Along Highway 1, traffic is very tightly controlled by traffic lights placed every half mile to cut down on speeding. Motor vehicle accidents, however, are more common along Highway 1 than on any other road in the city. Clearly, this problem can only be solved by adding more traffic lights to the highway, reducing speeding even more.
Which of the following, if true, casts the most doubt on the effectiveness of the solution proposed above?
A. The average speed on Highway 1 is already 35 miles per hour, making more traffic lights unnecessary.
B. The city council does not have sufficient funds budgeted for improvements along Highway 1.
C. Highway 1 is the longest road in the city, making motor vehicle accidents statistically more likely.
D. Most motor vehicle accidents along Highway 1 are rear-end collisions that occur when one of the parties is unable to stop safely at a traffic light.
E. There are more traffic-light controlled intersections on Highway 1 than there are on- and off-ramps.
Situation:Additional traffic lights are proposed along Highway 1 to cut down on speeding. It is assumed that speeding is the cause of most motor vehicle accidents along the highway.
Reasoning: Which of the following casts the most doubt on the proposed solution? The solution proposed in the passage assumes both that most accidents along Highway 1 are caused by speeding and that traffic lights are the most effective method of reducing speeding. If, however, it can be demonstrated that most motor vehicle accidents have a cause other than mere speeding, the proposed solution will be seriously undermined.
A. The speed limit on the road is irrelevant because drivers can easily choose to break it.
B. Though this fact might make implementation more difficult, it does not directly address the effectiveness of the proposed solution.
C. This may be an explanation for the frequency of motor vehicle accidents, but it does not address the effectiveness of the proposed solution.
D. CORRECT. This option casts the most doubt on the effectiveness of the proposed solution by offering an alternative explanation for the causes of the frequent accidents along Highway 1. If most accidents are caused by an inability to stop safely at traffic lights, then more lights will only add to the problem.
E. This information is irrelevant to determining the effectiveness of the proposed solution.
Answer: D
Along Highway 1, traffic is very tightly controlled by traffic lights placed every half mile to cut down on speeding. Motor vehicle accidents, however, are more common along Highway 1 than on any other road in the city. Clearly, this problem can only be solved by adding more traffic lights to the highway, reducing speeding even more.
Which of the following, if true, casts the most doubt on the effectiveness of the solution proposed above?
A. The average speed on Highway 1 is already 35 miles per hour, making more traffic lights unnecessary.
B. The city council does not have sufficient funds budgeted for improvements along Highway 1.
C. Highway 1 is the longest road in the city, making motor vehicle accidents statistically more likely.
D. Most motor vehicle accidents along Highway 1 are rear-end collisions that occur when one of the parties is unable to stop safely at a traffic light.
E. There are more traffic-light controlled intersections on Highway 1 than there are on- and off-ramps.
Situation:Additional traffic lights are proposed along Highway 1 to cut down on speeding. It is assumed that speeding is the cause of most motor vehicle accidents along the highway.
Reasoning: Which of the following casts the most doubt on the proposed solution? The solution proposed in the passage assumes both that most accidents along Highway 1 are caused by speeding and that traffic lights are the most effective method of reducing speeding. If, however, it can be demonstrated that most motor vehicle accidents have a cause other than mere speeding, the proposed solution will be seriously undermined.
A. The speed limit on the road is irrelevant because drivers can easily choose to break it.
B. Though this fact might make implementation more difficult, it does not directly address the effectiveness of the proposed solution.
C. This may be an explanation for the frequency of motor vehicle accidents, but it does not address the effectiveness of the proposed solution.
D. CORRECT. This option casts the most doubt on the effectiveness of the proposed solution by offering an alternative explanation for the causes of the frequent accidents along Highway 1. If most accidents are caused by an inability to stop safely at traffic lights, then more lights will only add to the problem.
E. This information is irrelevant to determining the effectiveness of the proposed solution.
Answer: D
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26 Jun 2016, 23:56
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Why C is incorrect? If the frequency of accidents (=number of accidents in a given time) is so high, because the road is the longest one, then adding more lights would not affect it, because it doesn't solve the problem. Thus the solution is inefficient.
