Route 0?

[Quillz]

Do any states have a Route 0? I know that AASHTO doesn't allow 0 to be used on either the Interstate or US Route networks, but every state generally maintains its own network of roads.

Frankly, though, I see no reason why there couldn't be an Interstate 0 or Route 0. It's a perfectly valid even number (could have 100, 200, 300, etc. as 3di) and would work very well as an even more southerly Interstate (south of 10) or the most northerly US Route (north of 2.) At least, it could have had the number been put to use when both systems were being planned.

[Chris]

There some route 0 roads in Europe, for example R0 as the ring road of Brussels and M0 as the Budapest beltway. I believe there is another A0 somewhere in Asia or the Caribbean, but I can't recall where.

[vdeane]

The mathematical reason: The interstate numbers are a subset of the set of positive integers, and since 0 isn't a positive integer, it can't be used.

The actual reason: I don't know.  It might be to "normalize" the grid system a little (there's one more north-south transcontinental possible than east-west).  It might also be because most people (who aren't programmers) start counting at 1.

[Truvelo]

There some route 0 roads in Europe, for example R0 as the ring road of Brussels and M0 as the Budapest beltway. I believe there is another A0 somewhere in Asia or the Caribbean, but I can't recall where.

There's one in Sri Lanka.

[Kacie Jane]

The mathematical reason: The interstate numbers are a subset of the set of positive integers, and since 0 isn't a positive integer, it can't be used.

The actual reason: I don't know.  It might be to "normalize" the grid system a little (there's one more north-south transcontinental possible than east-west).  It might also be because most people (who aren't programmers) start counting at 1.

Your mathematical reason fails, because while they are a subset of the positive integers, if we're arguing from a solely mathematical standpoint, they are also a subset of the non-negative integers, and for that matter, of all integers, rational numbers, etc.  (I have a sudden urge to change my avatar to the shield for Interstate Pi.)

Essentially what the original poster is asking is why the interstate numbers are thus far limited to the positive integers (also known as the counting numbers) and I have a feeling it's the last reason you gave.

[Bickendan]

I use Interstate Pi for some of my maps, along with Interstate i, e, Delta and Sigma, to fill in the more diagonal routes outside the grid proper.

[agentsteel53]

yes, but is there an e, pi, i, 1 multiplex?  if so, is it with route 0?

[Bickendan]

There is now :twisted:

[Scott5114]

Oklahoma's planning maps show a few SH-0s, as well as a SH-0B in Langston. None of them are signed, however. More likely the "SH-00" label is just to show that the route is state maintained but not numbered or marked.

[NE2]

Close enough for me... (photo by Scott5114, cc-by-sa)

[Quillz]

Zero is neither positive nor negative but it is an even number, and thus I don't see why AASHTO couldn't have had an east-west Route/Interstate 0, other than them just finding it to cause confusion or something.

[nyratk1]

I want a Route π, it would be delicious.

[Quillz]

I want a Route π, it would be delicious.

I know some countries, like New Zealand, have a Route R, while other have Route <letter>.

[Scott5114]

Zero is neither positive nor negative but it is an even number, and thus I don't see why AASHTO couldn't have had an east-west Route/Interstate 0, other than them just finding it to cause confusion or something.

Well, if you define an "even number" to be any number divisible by two, it is an even number, but then again it is also an odd number, because 0 is divisible by anything. I guess.

[agentsteel53]

but then again it is also an odd number, because 0 is divisible by anything.

that is not the definition of an odd number.  odd numbers are those of the form 2N + 1, where N is an integer.  0 is not of that form.

[Truvelo]

Here's one, although I cheated slightly

[agentsteel53]

I believe Wisconsin features County OO and County OOO as well.

[mightyace]

I use Interstate Pi for some of my maps, along with Interstate i, e, Delta and Sigma, to fill in the more diagonal routes outside the grid proper.

Does that mean that Interstate Pi has Pi-holes instead of potholes? 

[Bickendan]

Yes -- strawberry rhubarb, apple cinnamon, pumpkin, cherry...

[english si]

Don't forget Steak and Kidney, Fish, Chicken and Mushroom and, at Christmas, mincemeat (which doesn't contain any meat nor is savoury)

[realjd]

yes, but is there an e, pi, i, 1 multiplex?  if so, is it with route 0?

Come on now. That would be highly irrational.

[on_wisconsin]

[Alps]

Don't forget Steak and Kidney, Fish, Chicken and Mushroom and, at Christmas, mincemeat (which doesn't contain any meat nor is savoury)

Mincemeat can contain meat.  I should know.

[english si]

Not normally, any more, though.

[Ian]

Don't mean to hijack the thread, but I have a curious question about Wisconsin and Missouri's lettered routes. Do they ever cross the capital "I"s to prevent it from getting mixed up with a "1"? Do they even have a route I or route II?