Exit 0

[Alex]

I-110 in Louisiana has too many Exits 1 - from south to north - 1I-J (Terminus), 1A, 1B, 1C, 1H, 1D, 1G, 1E and 1F (yes, in that order.)

Only Exit 0 I've ever seen was the one on I-40 in Texas. And even then they're hit or miss - I-45 doesn't have any Exits 0, but has at least one exit that'd probably qualify.

Certainly you must have driven through Interstate 65's southern terminus 

[oscar]

there is even an Exit 00 somewhere (Texas?  I forget) where apparently there were exits 0 and 1 and they wanted to fit one inbetween but didn't want to call it 0A.  Or something like that.  Maybe it was even before 0, and they didn't want exit -1.

The only 00 I remember seeing was in Puerto Rico.

Yeah, within the very complicated PR18/22 interchange in San Juan.

http://www.hawaiihighways.com/Puerto-Rico-page2.html (second photo from the top).

[Darkchylde]

I-110 in Louisiana has too many Exits 1 - from south to north - 1I-J (Terminus), 1A, 1B, 1C, 1H, 1D, 1G, 1E and 1F (yes, in that order.)

Only Exit 0 I've ever seen was the one on I-40 in Texas. And even then they're hit or miss - I-45 doesn't have any Exits 0, but has at least one exit that'd probably qualify.

Certainly you must have driven through Interstate 65's southern terminus 

Last time was 2004, and it was on a Greyhound, so I didn't see the exit tabs.

[Hot Rod Hootenanny]

I-110 in Louisiana has too many Exits 1 - from south to north - 1I-J (Terminus), 1A, 1B, 1C, 1H, 1D, 1G, 1E and 1F (yes, in that order.)

Only Exit 0 I've ever seen was the one on I-40 in Texas. And even then they're hit or miss - I-45 doesn't have any Exits 0, but has at least one exit that'd probably qualify.

I get the feeling that I-110's terminus with I-10 in Baton Rouge wasn't originally numbered (or lettered in this case) since that I & J seem out of place.  Then again, I'm not sure who in Red Stick had the bright idea of giving every offramp from 110 NB & SB it's own letter designation.
But that quirk I believe gives I-110 the highest exit letter total for just one interstate (unlike KC or Cincy where multiple interstates are sharing the letters).

[Alex]

I-110 in Louisiana has too many Exits 1 - from south to north - 1I-J (Terminus), 1A, 1B, 1C, 1H, 1D, 1G, 1E and 1F (yes, in that order.)

Only Exit 0 I've ever seen was the one on I-40 in Texas. And even then they're hit or miss - I-45 doesn't have any Exits 0, but has at least one exit that'd probably qualify.

I get the feeling that I-110's terminus with I-10 in Baton Rouge wasn't originally numbered (or lettered in this case) since that I & J seem out of place.  Then again, I'm not sure who in Red Stick had the bright idea of giving every offramp from 110 NB & SB it's own letter designation.
But that quirk I believe gives I-110 the highest exit letter total for just one interstate (unlike KC or Cincy where multiple interstates are sharing the letters).

Exit 1I and 1J were previously unnumbered (2002 photo): http://www.interstate-guide.com/images110/i-110_la_st_24.jpg
Exit numbers were assigned by 2003: http://www.interstate-guide.com/images110/i-110_la_st_15.jpg

[rarnold]

There are "Exit 0" tabs at the I-380 Southern Terminus in Iowa. Makes sense in this case because the roadway continues as U.S. 218/Iowa 27.

[Fcexpress80]

As I recall, there is an Exit 0 on Interstate 90 on the Montana side of the Idaho/Montana Border at Lookout Pass.  The exit provides access to a ski area at the summit.  Of note; Lookout Pass is also a time zone border.

[Brandon]

ISTHA also seems to like Exit 0.  I-355's south end is marked as Exit 0A for I-80 East and Exit 0B for I-80 West.

[DandyDan]

As of this year, I-480 in Iowa has an Exit 0 for "Riverfront" in Council Bluffs.

[dgolub]

I'm surprised that no one has mentioned Exit 0 on I-70 in Wheeling, West Virginia, yet.

[dgolub]

Now with sequential exits, it would be wrong for there to be an Exit 0, since you don't count a 0th item when counting sequentially.

Unless you were a computer scientist

Yes, I've seen CS books with a Chapter 0.  My introductory electrical engineering textbook from college also has one.

[Big John]

There is also a 0th law of thermodynamics.

[The High Plains Traveler]

I-172 where it ends at I-72, just east of Hannibal.

[theline]

The Indiana Toll road interchange with US 12/20/41 where it becomes the Chicago Skyway is Exit 0.

This was true even in the sequential-numbering days, despite the discussion upthread about "exit 0" making no sense in a sequential numbering scheme. According to Wikipedia, there were 2 exits numbered 0 in those days, including also the western SR 912 exit: http://en.wikipedia.org/wiki/Indiana_Toll_Road#Exit_list. I have not confirmed that.

[NE2]

According to Wikipedia, there were 2 exits numbered 0 in those days, including also the western SR 912 exit: http://en.wikipedia.org/wiki/Indiana_Toll_Road#Exit_list. I have not confirmed that.

According to who the fuck added that turd? That part of SR 912 was built in 1984, but the exits were renumbered in 1981.

[rickmastfan67]

ISTHA also seems to like Exit 0.  I-355's south end is marked as Exit 0A for I-80 East and Exit 0B for I-80 West.

Have a picture?

[english si]

This was true even in the sequential-numbering days, despite the discussion upthread about "exit 0" making no sense in a sequential numbering scheme.

where's this discussion?

Certainly, informally, 'junction 0' appears in UK roadgeek discussions, when referring to unnumbered termini.

And at least one of them is official - here's secondary legislation referring to the M58's junction 0. The number doesn't appear on signs, not least as there is no exit.

[Brandon]

ISTHA also seems to like Exit 0.  I-355's south end is marked as Exit 0A for I-80 East and Exit 0B for I-80 West.

Have a picture?

Not yet.  It was in the dark when I saw it.  Not exactly prime photo taking time.  ISTHA also has an "EXIT 0 A-B" tab in the yard at the Cermak Road Toll Plaza on the Tri-State (where they store all their finished signs prior to installation).  There's only one place on the entire system it can go.

[PHLBOS]

While the exit for I-295 along I-195 (& NJ 29) is signed as Exit 60, the same exit number for the interchange as I-295 itself, it should theoretically be Exit 0 IMHO.  Just eliminate the 6 from the exit tabs of the following BGS' and their respective subordiantes.

Along NJ 29 Eastbound:



Along I-195 Westbound:



Note: I am aware of the upcoming switch for I-295 north of the interchange becoming a western extension of I-195 once the I-95/PA Turnpike interchange is completed.  Such change will make the interchange number for the I-195 pieces become Exit 16(?) rather than 60; which would make this interchange no longer a candidate for Exit 0 from any direction.

[roadman]

I-110 in Louisiana has too many Exits 1 - from south to north - 1I-J (Terminus), 1A, 1B, 1C, 1H, 1D, 1G, 1E and 1F (yes, in that order.)

Only Exit 0 I've ever seen was the one on I-40 in Texas. And even then they're hit or miss - I-45 doesn't have any Exits 0, but has at least one exit that'd probably qualify.

Certainly you must have driven through Interstate 65's southern terminus 

Technically, shouldn't that be "EXIT 0A" and "EXIT 0B"?.  And the '10 WEST" BGS illustrates one of my top signing pet peeves - squeezing multiple down arrows onto a narrow panel, with the result that the arrows don't properly line up over the lanes they apply to.

[PHLBOS]

Technically, shouldn't that be "EXIT 0A" and "EXIT 0B"?  And the '10 WEST" BGS illustrates one of my top signing pet peeves - squeezing multiple down arrows onto a narrow panel, with the result that the arrows don't properly line up over the lanes they apply to.

Something tells me that I-10 West BGS panel may have originally been sized for only 2 arrows but was changed to 3 arrows either just after the BGS was already fabricated and/or erected.

I find it interesting that the only listed destinations are states rather than cities.  Such practice is now either a No-No or is discouraged in the eyes of MUTCD/FHWA.

[Brandon]

I find it interesting that the only listed destinations are states rather than cities.  Such practice is now either a No-No or is discouraged in the eyes of MUTCD/FHWA.

Somebody better tell IDOT and ISTHA with their "Wisconsin", "Indiana", and "Iowa" controls.

[PHLBOS]

I find it interesting that the only listed destinations are states rather than cities.  Such practice is now either a No-No or is discouraged in the eyes of MUTCD/FHWA.

I should have emphasised the word only in bold earlier; I've since done so.  While I have seen BGS' that list a neighboring state as a destination for one sign/direction; very rarely (if ever) have I seen every sign for every different direction listing only states per the I-10 example.

Somebody better tell IDOT and ISTHA with their "Wisconsin", "Indiana", and "Iowa" controls.

Don't shoot the messenger here; I'm just posting my observations & findings.  Personally, I think that barring the listing of states as a destination is absolutely ludicrous because there are indeed some cases where listing such makes more sense and is more appropriate.  Example: the listing of New Jersey for an eastbound I-276/PA Turnpike destination.

[ethanhopkin14]

Why not have Exit 0?  If you are staying true to mileage based exits, you have to have an Exit 0 if the junction happens before the 1st mile post.

In Texas there is an Exit 0 on Interstate 10 for FM 1905, Anthony and an Exit 0 on Interstate 40 in Glenrio for Bussiness Loop 40.

The other mile zeros in Texas don't have Exits 0, which include Interstates 20,27,30,35,35W,37 and, 45. Now I have never witnessed Interstate 44's terminus so not sure about that one.

That I remember none of the 3dis in Texas have Exit 0, except Interstate 110 in El Paso at the border. I-69 and I-2 (and the suffixed I-69s for that matter) have no exit numbers so they can't be counted. US 75 in Dallas has sequential exit numbers so there is no need for an exit 0. And Interstate 345's exit numbers do not reflect the mile posts on I -345. 

[mwb1848]

I'd rather have an Exit O than an exit numbering system which starts arbitrarily. When TxDOT replaced button copy signage on US 54 in El Paso, they renumbered the exits starting at 20.

Loop 375, at the terminus of the highway, became Exit 20. US 62, Paisano Dr., became 20A, and I-110 to Juarez became 20B. (I don't think I've ever seen ANY exit tabs on I-110 itself.)



These signs have been slightly modified to reflect a traffic pattern under which cross-border autos use I-110 and cross-border trucks use US 62 to access the Bridge of the Americas.