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Even/odd rules for cardinal direction

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TheStranger:
So do most states use odd-north/south, even-east/west as the delineator?  I think New York has it reversed (notably with NY 5, NY 17, and NY 22), while some states completely ignore the distinction.

California mostly follows this rule, but there are some notable exceptions:

Route 14 - former US 6 (east-west route with a long north-south segment)
Route 91 - former US 91 of course (southernmost segment of a long north-south highway)
Route 160 and 70 - former Route 24 (longer extent of an east-west route); Route 70 north of Marysville is former US 40A as well (and is signed east-west rougly after Route 191)
Route 299 - former US 299
Route 37 - formerly ran up current Route 121 as a north-south route (the portion east of Sears Point was once Route 48)
Route 371 - former Route 71


And some examples which were not based on historical numberings:
77, 201, 155, 236, 237, 238 (the previous three are all former routings of Route 9), unbuilt 164 and 258, 84 from Rio Vista north (an extension of an existing east-west route), 86 (former US 99), 72, 82, 254 (last three are former routings of US 101), 193

The longest "opposite number" routes probably are 299 and 14.

corco:
Washington mostly does with a couple of small exceptions (SR 523 is a straight line east-west, SR 531 runs east-west for 85% of its route and then turns north south for the last 15%)
Idaho couldn't care less about the distinction
Oregon does except for some of the post-2002 routes that just use the highway number. 
Utah does not at all
Wyoming doesn't

mightyace:
I don't think Pennsylvania does, at least, not anymore.
I haven't seen any such pattern in Ohio or Tennessee either.

I'm sure someone will correct me if I'm mistaken.  :colorful:

Michael:

--- Quote from: TheStranger on February 13, 2009, 06:27:05 PM ---I think New York has it reversed (notably with NY 5, NY 17, and NY 22), while some states completely ignore the distinction.

--- End quote ---

NY 89 and 13 are north-south.  NY 104 and 222 are east-west.

vdeane:
I think New York numbers are pretty much random.

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