04assn3 - 1.221J / 11.527J / ESD.201J Transportation...

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1.221J / 11.527J / ESD.201J Transportation Systems FALL 2004 ASSIGNMENT 3 Abating the Mobility and Air Quality Crisis in Mexico City Date assigned: October 1, 2004 3A Date due: Lecture 10 Value: 10 points 3B Date due: Lecture 13 Value: 20 points This assignment is a lot of work and accounts for 30% of your final grade. That is why we have given you a lot of time for it. Part 3A is due in a week and a half and Part 3B is due 3 weeks from today. This kind of assignment cannot be done well by pulling an all- nighter or two. There is thinking to be done that is best performed over time and writing to be done, before which you need to complete the quantitative analysis. Give yourself enough time to perform well. On Tuesday, October 5, the second half of class will be a press conference. This is an opportunity for you to ask questions of the TA for clarification of the assignment. As such, please read the problem statement thoroughly so that you can come to class with questions prepared. At the very least, you should read the assignment so that you can understand responses to other students’ questions. Be aware that broad, general questions such as “how do I do the assignment?” will not be accepted. In addition, this assignment is spreadsheet-intensive. If you are well-versed with Excel or a similar spreadsheet software, you should not have much trouble putting the quantitative portion together. For those of you with less experience, there will be a tutorial on Wednesday, October 6 at 6:30 pm. 1.221 Assignment 3 1 September 30, 2004
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Instructions: Read this document in its entirety AT LEAST once, and then proceed. 1. Introduction Welcome to the Mexico City Metropolitan Area, one of the world’s largest and most historically significant cities. Centuries ago, Aztecs built an empire at Tenochtitlán that would later be conquered by a wave of Spanish explorers. Built subsequently atop the Aztec ruins, Mexico City today emerges as a city of layers: cultural layers, architectural layers, ethnic layers, geographic layers, and economic layers. Modern Mexico City is plagued by a number of potentially disastrous natural and human crises: the Popocatépetl volcano, earthquakes, land subsidence, traffic congestion, and, perhaps most notably, air pollution. In fact, one of the most visible “layers” in Mexico City is the thermal inversion layer, a thick layer of airborne contaminants that sticks close to the ground most days as cold air at lower elevations becomes trapped by warmer air at higher elevations. Adding to the problem is a ring of mountains which nearly encircles the Valley of Mexico, leaving little opportunity for pollutants to escape. The high base elevation of Mexico City (about 7500 feet above MSL) further compounds the air quality problem due to lower concentrations of oxygen, which makes tuning of vehicle engines for optimal performance a challenging and costly task. Although levels of some pollutants have declined in the last decade, Mexico City’s air
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This note was uploaded on 12/06/2011 for the course ESD 1.221j taught by Professor Josephsussman during the Fall '04 term at MIT.

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04assn3 - 1.221J / 11.527J / ESD.201J Transportation...

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