Identifying and Analyzing Main Idea and Theme in Contemporary Life Passages - ISEE Lower Level Reading Comprehension

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"The Aging of Public Transportation Systems" by Matthew Minerd (2013)

As cities develop, their public transportation systems often show signs of aging that are mixed with aspects that are quite up-to-date. An example of such a situation can be found in the transportation system in Washington DC. This system is made up of a mixture of buses and trains that connect people to locations in DC, Maryland, and Virginia. While the system has been well maintained and updated over the years, it still shows evidence that certain sections are older than others.

This is particularly noticeable when one considers the multiple lines that connect in Washington DC itself. Within the city, there are five different sets of tracks that run in various directions and to sundry places. A number of the newer lines are in excellent condition and rarely break down; however, the case of the red line is somewhat different. This oldest line of the metro train system often has issues because of its age, experiencing a number of track and signal issues even at rush hour when the overall system is its most efficient. Admittedly, the transportation authority is working to update this line and make it less problematic. Still, until this work is completed, it is obvious to all who are familiar with the metro train system that the red line is the oldest and most out of date.

What is the main idea that this passage seeks to express?

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Answer

The main idea for this selection is directly state in the opening sentence: "As cities develop, their public transportation systems often show signs of aging that are mixed with aspects that are quite up-to-date." Although the second paragraph does focus on issues with the Washington DC red line, it likewise makes the point that this is in contrast to the newer lines that rarely break down; therefore, the best way to express the main idea of this selection is by stating, "Transportation systems in cities often are a mix of the old and the new, as is evident from the example of the Washington DC transportation system."

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