U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > U.S. Forums > North Carolina > Raleigh, Durham, Chapel Hill, Cary
 [Register]
Raleigh, Durham, Chapel Hill, Cary The Triangle Area
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
Reply Start New Thread
 
Old 10-11-2013, 12:48 PM
 
Location: Cary, NC
2,801 posts, read 3,765,740 times
Reputation: 2939

Advertisements

Quote:
Originally Posted by BoBromhal View Post
that might be quite valuable information. but even/odd is based on the 0, not the 4.
There is no correlation of even/odd (any digit) and direction for three-digit interstates, only two-digit ones.

For three-digit interstates, the second and third digits are simply taken from the parent two-digit interstate (in this case I-40), while as garnetpalmetto says, the first digit indicates whether it's a loop/bypass that connects to another interstate on both ends (even) or a spur connecting on only one end (odd).

There are of course a (very) few exceptions to this rule, but the "540" name itself says nothing about whether it should run east/west or north/south...it is free to do either.
Reply With Quote Quick reply to this message

 
Old 10-11-2013, 01:00 PM
 
1,477 posts, read 1,879,943 times
Reputation: 1521
Quote:
Originally Posted by BoBromhal View Post
that might be quite valuable information. but even/odd is based on the 0, not the 4.
I know that. My comment solely pertained to three digit interstates, however and underlines what SFSpiderman just pointed out. When I lived in Columbia, SC, for instance, there was I-126. It's a spur off Interstate 26 and while Interstate 26 is (nominally) an East-West interstate (I say nominally because of its alignment also being somewhat North-South), I-126 is under no obligation to go East-West.
Reply With Quote Quick reply to this message
 
Old 10-11-2013, 01:01 PM
 
9,198 posts, read 21,163,602 times
Reputation: 8516
I think what we're all struggling with is that we're attempting to apply logic to explain something the NC DOT did.
Reply With Quote Quick reply to this message
 
Old 10-11-2013, 01:17 PM
 
2,037 posts, read 2,369,668 times
Reputation: 1695
Quote:
Originally Posted by CHTransplant View Post
If it's the one I'm thinking of, from I-40E onto I-540E, it's one of the original signs they put up when the very first section of I-540 was built (the section from I-40 to US70). At that time, they hadn't decided on designating the routes east and west, and that leg pretty much went due north. For a while several of the signs used north or south.
Ding ding ding.
Reply With Quote Quick reply to this message
 
Old 10-11-2013, 03:24 PM
DPK
 
3,149 posts, read 3,433,458 times
Reputation: 3777
Quote:
Originally Posted by CHTransplant View Post
I think what we're all struggling with is that we're attempting to apply logic to explain something the NC DOT did.
We should probably stop before a black hole rips the universe apart, lol.
Reply With Quote Quick reply to this message
 
Old 10-11-2013, 05:40 PM
 
Location: Raleigh NC
7,773 posts, read 6,123,712 times
Reputation: 6898
Quote:
Originally Posted by garnetpalmetto View Post
I know that. My comment solely pertained to three digit interstates, however and underlines what SFSpiderman just pointed out. When I lived in Columbia, SC, for instance, there was I-126. It's a spur off Interstate 26 and while Interstate 26 is (nominally) an East-West interstate (I say nominally because of its alignment also being somewhat North-South), I-126 is under no obligation to go East-West.
so what you're saying is they're perfectly Okay deciding to call it 540 North. No wonder poor Kelly is confused.
Reply With Quote Quick reply to this message
 
Old 10-12-2013, 04:13 PM
 
2,037 posts, read 2,369,668 times
Reputation: 1695
The signs on Atlanta's I-285 (the Perimeter) have changed from north to east to south to west at the four corners for decades. Raleigh used to have this problem with I-440 before NCDOT made it a half-circle instead of a full circle. But the problem will exist in Charlotte (I-485) when the north arc is completed, and likewise in Greensboro (I-840), and eventually in Raleigh because I-540 will be renumbered I-640 when the south and southeast arcs are completed... someday.
Reply With Quote Quick reply to this message
 
Old 10-12-2013, 04:26 PM
rfb
 
Location: Raleigh, NC
1,843 posts, read 5,009,470 times
Reputation: 1345
I'm not sure I-540 will ever be renumbered I-640. The portion south of I-40 was renamed NC-540 when it was made a toll road is not part of I-540.
Reply With Quote Quick reply to this message
 
Old 10-12-2013, 07:55 PM
 
2,037 posts, read 2,369,668 times
Reputation: 1695
Perhaps not. I've wondered why NCDOT has never put a number on the Wade Avenue Extension, other than the hidden designation of SR 1789. Calling it NC 140 or 340 would help people navigate there.
Reply With Quote Quick reply to this message
 
Old 10-13-2013, 12:08 AM
 
1,477 posts, read 1,879,943 times
Reputation: 1521
Quote:
Originally Posted by BoBromhal View Post
so what you're saying is they're perfectly Okay deciding to call it 540 North. No wonder poor Kelly is confused.
Yes and no here - again the sign is that it's North to I-540, not North I-540. But as wizard-xyzzy pointed out, it can happen. Another instance is I-294 in Illinois. While I-94 is an East-West interstate, 294 runs generally north-south. Similarly, I-5 is a north-south highway, while I-105 (the California one, not the Oregon one, because yes, there can be multiple 3-digit interstates with the same number, so long as they're in different states) runs generally east-west.

Quote:
Originally Posted by wizard-xyzzy View Post
Perhaps not. I've wondered why NCDOT has never put a number on the Wade Avenue Extension, other than the hidden designation of SR 1789. Calling it NC 140 or 340 would help people navigate there.
Agree - it'd have to be I-340, I-740, or I-940, though since I-140 is already in use in NC as a spur of I-40 in Wilmington.

Last edited by garnetpalmetto; 10-13-2013 at 12:30 AM..
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:



Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > U.S. Forums > North Carolina > Raleigh, Durham, Chapel Hill, Cary
Similar Threads
Follow City-Data.com founder on our Forum or

All times are GMT -6.

2005-2018, Advameg, Inc.

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top