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Old 04-27-2004, 01:38 AM   #1
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Default Everything You Wanted to Know About 3 Digit Highways

http://kurumi.com/roads/3di/index.html

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Primary interstate highways in the United States have one- or two-digit numbers, such as I-5 and I-84. Three-digit interstate highways, or 3di'*, branch off or loop with the primary routes. A 3di takes the number of its parent and adds a multiple of 100: I-405 loops with I-5, and I-384 veers off from I-84.
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Old 04-27-2004, 01:40 AM   #2
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cool
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Old 04-27-2004, 03:24 AM   #3
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I coulda told you that.
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Old 04-27-2004, 03:25 AM   #4
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Do anyone know what the even and odd number interstates mean?
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Old 04-27-2004, 03:34 AM   #5
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Even - East - west

Odd - North - south
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Old 04-27-2004, 03:37 AM   #6
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Quote:
Originally Posted by MOS95B
Even - East - west

Odd - North - south
too easy i guess.
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Old 04-27-2004, 08:02 AM   #7
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How about this one: why are most freeway signs put on the right side of the road?
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Old 04-27-2004, 08:07 AM   #8
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I'd guess free space. Not all highways have medians.

Another guess would be safety. For those people who tend to go where they are looking. You put the signs to the left, and they are gonna go that way, where the other cars are.
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Old 04-27-2004, 08:16 AM   #9
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Part of your answer is VERY close... there is actually an official reason...
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Old 04-27-2004, 02:40 PM   #10
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What is the difference between a 3-number interstate with an odd leftmost number versus an even leftmost number?
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