medium · GMAT Verbal
The city installed a new traffic circle at the Oak Street intersection, and accidents there decreased by 40% in the first year. Therefore, the city should install traffic circles at all high-accident intersections to improve overall safety.
Which of the following is an assumption required by the argument?
- Oak Street had recorded more accidents per year than any other single intersection in the city before installation.
- Drivers who approached the new Oak Street circle had received special safety training during that same year.
- The characteristics of the Oak Street intersection are representative of other high-accident intersections in the city.
- The total cost of installing new traffic circles is far lower than the cost of medically treating injured accident victims.
- The 40% reduction recorded at Oak Street is the single largest safety improvement achievable by any possible traffic intervention.
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