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Old 10-24-2012, 02:53 PM
 
Location: Phoenix, Arizona
1,112 posts, read 3,983,258 times
Reputation: 1239

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I believe it has to do with a lack of continuity.. An interstate that stops and starts again is more confusing than two separate interstates. Unless a new EXTENSION connecting I-17 to I-19 is built, it will probably never happen. Without this, it must either stop and start, or be duplexed along I-10, something that the FHWA and ADOT both avoid doing at all costs, because it confuses people and adds complexity to the existing numbering system.

One could argue the fact that these should not even be classified as "interstates" as they do not leave the state of Arizona.
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Old 10-24-2012, 03:04 PM
 
Location: The canyon (with my pistols and knife)
14,171 posts, read 22,611,950 times
Reputation: 17329
Quote:
Originally Posted by CodyW View Post
I believe it has to do with a lack of continuity.. An interstate that stops and starts again is more confusing than two separate interstates. Unless a new EXTENSION connecting I-17 to I-19 is built, it will probably never happen. Without this, it must either stop and start, or be duplexed along I-10, something that the FHWA and ADOT both avoid doing at all costs, because it confuses people.

One could argue the fact that these should not even be classified as "interstates" as they do not leave the state of Arizona.
There are several "intrastate" Interstates:


I-4 (Florida)
I-12 (Louisiana)
I-16 (Georgia)
I-17 (Arizona)
I-19 (Arizona)
I-27 (Texas)
I-37 (Texas)
I-45 (Texas)
I-66 (Virginia)
I-88 (Illinois, New York)
I-96 (Michigan)
I-97 (Maryland)
I-99 (Pennsylvania)


And I-17 would not stop and start again. I-17 WOULD MULTIPLEX WITH I-10 FOR 112 MILES. That means if you're driving from Phoenix to Tucson, you'd see two red and blue Interstate signs: one with the number "10" on it, and the other with the number "17" on it. Above the I-10 sign would be a smaller blue sign that says "EAST," and above the I-17 sign would be a smaller blue sign that says "SOUTH." In other words, that highway alignment from Phoenix to Tucson would be both I-10 eastbound and I-17 southbound. It's similar to the way the Pennsylvania Turnpike is both I-70 and I-76 for 86 miles east of Pittsburgh, or the way I-90 and I-94 run concurrently through Chicago. This really shouldn't be that confusing.
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Old 10-25-2012, 12:50 PM
 
570 posts, read 996,811 times
Reputation: 415
There are quirks in interstate numbering. A highway that is mostly diagonal is going to break the grid at some point. If the state or feds wanted different numbers, that would have happened a long time ago.

Interstate Highway System - Wikipedia, the free encyclopedia

BTW this is the link to the I-11 study:

Home - I-11 and Intermountain West Corridor Study

Last edited by swbrotha100; 10-25-2012 at 01:02 PM..
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Old 10-25-2012, 07:37 PM
 
Location: northern Vermont - previously NM, WA, & MA
10,725 posts, read 23,665,192 times
Reputation: 14561
Quote:
Originally Posted by Gnutella View Post
There are several "intrastate" Interstates:


I-4 (Florida)
I-12 (Louisiana)
I-16 (Georgia)
I-17 (Arizona)
I-19 (Arizona)
I-27 (Texas)
I-37 (Texas)
I-45 (Texas)
I-66 (Virginia)
I-88 (Illinois, New York)
I-96 (Michigan)
I-97 (Maryland)
I-99 (Pennsylvania)


And I-17 would not stop and start again. I-17 WOULD MULTIPLEX WITH I-10 FOR 112 MILES. That means if you're driving from Phoenix to Tucson, you'd see two red and blue Interstate signs: one with the number "10" on it, and the other with the number "17" on it. Above the I-10 sign would be a smaller blue sign that says "EAST," and above the I-17 sign would be a smaller blue sign that says "SOUTH." In other words, that highway alignment from Phoenix to Tucson would be both I-10 eastbound and I-17 southbound. It's similar to the way the Pennsylvania Turnpike is both I-70 and I-76 for 86 miles east of Pittsburgh, or the way I-90 and I-94 run concurrently through Chicago. This really shouldn't be that confusing.
Also H1, H2, & H3 in Hawaii.
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Old 10-25-2012, 07:38 PM
 
Location: northern Vermont - previously NM, WA, & MA
10,725 posts, read 23,665,192 times
Reputation: 14561
Quote:
Originally Posted by Gnutella View Post
There are several "intrastate" Interstates:


I-4 (Florida)
I-12 (Louisiana)
I-16 (Georgia)
I-17 (Arizona)
I-19 (Arizona)
I-27 (Texas)
I-37 (Texas)
I-45 (Texas)
I-66 (Virginia)
I-88 (Illinois, New York)
I-96 (Michigan)
I-97 (Maryland)
I-99 (Pennsylvania)


And I-17 would not stop and start again. I-17 WOULD MULTIPLEX WITH I-10 FOR 112 MILES. That means if you're driving from Phoenix to Tucson, you'd see two red and blue Interstate signs: one with the number "10" on it, and the other with the number "17" on it. Above the I-10 sign would be a smaller blue sign that says "EAST," and above the I-17 sign would be a smaller blue sign that says "SOUTH." In other words, that highway alignment from Phoenix to Tucson would be both I-10 eastbound and I-17 southbound. It's similar to the way the Pennsylvania Turnpike is both I-70 and I-76 for 86 miles east of Pittsburgh, or the way I-90 and I-94 run concurrently through Chicago. This really shouldn't be that confusing.
Also H1, H2, & H3 in Hawaii.


Oahu Freeways - H1 H201 H3 - YouTube
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Old 11-02-2012, 08:22 AM
 
3,743 posts, read 5,810,223 times
Reputation: 5446
I don't care what they call it, it needs to be built!!
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Old 11-02-2012, 05:04 PM
 
Location: Arizona, The American Southwest
54,477 posts, read 33,779,805 times
Reputation: 91672
It would probably be easier to rename I-15, that goes from southern California, through the high desert, then to Las Vegas, it should be renamed to I-7, I-9 or I-11, and the proposed interstate from Phoenix to Las Vegas should be given the name I-13 or I-15. I'm not sure why they left a big gap in the numbering between I-5 that goes through downtown Los Angeles, to Oregon and Washington, and I-15, which is about 50 miles east of downtown LA.

Another thing I was wondering about is, the stretch of I-10 from the southeast part of the Phoenix area to Tucson, it goes south/southeast and I think it should have been given an odd number, like 19.
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Old 11-02-2012, 05:26 PM
 
570 posts, read 996,811 times
Reputation: 415
Quote:
Originally Posted by Magnum Mike View Post
It would probably be easier to rename I-15, that goes from southern California, through the high desert, then to Las Vegas, it should be renamed to I-7, I-9 or I-11, and the proposed interstate from Phoenix to Las Vegas should be given the name I-13 or I-15. I'm not sure why they left a big gap in the numbering between I-5 that goes through downtown Los Angeles, to Oregon and Washington, and I-15, which is about 50 miles east of downtown LA.

Another thing I was wondering about is, the stretch of I-10 from the southeast part of the Phoenix area to Tucson, it goes south/southeast and I think it should have been given an odd number, like 19.

Las Vegas (and maybe Nevada in general) would have fought using the number 13. There's also the possibility that one day I-11 may go past Vegas (Reno is an option).

I-10 is a cross country route, so for continuity, the number should stay the same.
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Old 11-03-2012, 08:00 AM
 
Location: Phoenix
7,090 posts, read 9,125,607 times
Reputation: 8274
Quote:
Originally Posted by Magnum Mike View Post
Another thing I was wondering about is, the stretch of I-10 from the southeast part of the Phoenix area to Tucson, it goes south/southeast and I think it should have been given an odd number, like 19.
I know I'm wrong now. Back in the 70s I thought that was part of I17. I10 wasn't completed yet. There was a big gap missing from about I17 & McDowell out to Buckeye or so. So to me the freeway from Tucson to Flag was I17.

As to the proposed I11? I'm ambivalent. Part of me misses that narrow 2 lane hiway from Wickenburg to I40. Part of me is glad to see the improvements. Que sera!
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Old 11-03-2012, 08:41 AM
 
570 posts, read 996,811 times
Reputation: 415
Quote:
Originally Posted by locolobo13 View Post
I know I'm wrong now. Back in the 70s I thought that was part of I17. I10 wasn't completed yet. There was a big gap missing from about I17 & McDowell out to Buckeye or so. So to me the freeway from Tucson to Flag was I17.

As to the proposed I11? I'm ambivalent. Part of me misses that narrow 2 lane hiway from Wickenburg to I40. Part of me is glad to see the improvements. Que sera!
You're on the right track with the gap of I-10 back in the day. Originally, I-17 was going to end at today's Durango Curve. The current east-west segment of I-17 was I-10 for a little while. Maybe these links can explain a little better:

I-10
I-17
Urban Freeways

Personally, it would be nice if a future I-11 will speed up widening US 93 between Wickenburg and I-40.
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