Highway planners rarely design for the animals that already crossed the land before the road existed. Deer, elk, and smaller mammals keep to routes worn in by generations of use, and a new highway cut across such a route becomes a place where collisions cluster year after year. The fix that has proven effective is not more fencing along the whole road but a single overpass or underpass placed exactly on the old route, planted to resemble the surrounding terrain. Animals begin using them within a season, and the collision counts at those specific points drop sharply within a few years.
It can be inferred from the passage that collisions cluster at certain points because
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Correct answer to question 70 (Paragraph Comprehension): those points cross an animal route worn in over generations
Method
The passage says animals keep to routes worn in by generations of use and that a highway cut across such a route becomes a collision cluster point, tying the clustering to the old route rather than lighting or speed.
Updated: November 2026
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