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Driving
in America |
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The world's
biggest roadway is the American system of Interstate highways, totaling
over 45,000 miles (72,000 km).
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You can drive
2,906 miles (4,650 km) from New York to San Francisco on a single highway,
Interstate
80.
You can drive
3,085 miles (4,936 km) from Boston to Seattle on Interstate
90 (a remote section shown at left).
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The Interstate Highway System has a simple,
effective numbering convention, although there are exceptions:
- East/west roads have even numbers, while
north/south roads have odd numbers. Thus, Interstate 80 connects New York in the east to San Francisco in the west. Interstate 75 connects Detroit in the north to Miami in the south.
For north-south routes, the lowest numbers begin in the west, while the lowest numbered east-west routes are in the south.
- Roads divisible by 5 tend to be the major roads that cross most, if not all, of the USA.
- Three digit Interstate numbers are used near major cities. If the Interstate goes through or around the city, then it starts with an even number. If it stops somewhere in the city, then it gets an odd number.
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