The Road Built on a Footpath
Written by Studio AM.
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Imagine a town whose first footpath bends around a wet field. Carts begin using it, so workers add gravel. Shops face the busier route. Later the town lays water pipes beneath it, builds houses beside it, and finally covers it with pavement. By then the field has been drained. A straight road might serve new traffic better, but moving the old road would also mean moving pipes, entrances, and businesses.
This is path dependence: earlier choices change the cost and range of later choices. The original bend may have been sensible when the field was wet. After the reason disappears, the route can remain because people have built around it.
Path dependence does not mean that change is impossible or that the first choice always wins. A town may build a bypass when congestion becomes costly enough. A software community may replace an old format when conversion tools improve. The idea is that history changes the comparison. A design is judged not against a blank world, but against the expense of leaving the system already in use.
This matters when making early standards. A choice that is cheap to revise today can gather users, training, tools, and physical structures. Each new layer makes revision harder. Builders should therefore ask two questions: what works now, and what will other people have to rebuild if this choice later changes?
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Questions
Choose an answer. The explanation appears after you answer.
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Question 1 of 4
What is the main idea of the passage?
The answer is A: Early choices can persist because later investments make changing course costly
The road and other examples show how later investment changes the cost of revising an early choice.
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Question 2 of 4
What makes moving the old road expensive?
The answer is B: Pipes, entrances, houses, and businesses have been built around it
The opening paragraph lists the later structures that now depend on the route.
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Question 3 of 4
Why might a town still build a bypass?
The answer is C: The cost of congestion may eventually exceed the cost of changing the route
The third paragraph says change can occur when the problem becomes costly enough.
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Question 4 of 4
In this passage, “revision” means
The answer is D: a change to something already built or chosen
Revision refers to changing an existing design or standard.
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