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Old July 26th, 2010, 03:07 PM   #21
g.spinoza
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Quote:
Originally Posted by LMB View Post
You find it sensible, because you're used to it. For us it's different.
Rarely there is one exit per city, and it's easier to remember Exit 373 than Bologna Xxxxxx, if you don't know the language.

Best, IMHO, though, would be Bologna 1, Bologna 2, etc. I haven't seen that system anywhere.
Yes but most of the times is Firenze Nord, Firenze Sud, Brescia Ovest, Brescia Est. Not that difficult.
Bologna is an exception since it has three exits (Bologna Casalecchio, Bologna Fiera, Bologna San Lazzaro).

If it was Firenze 1 and 2 I'm sure I would never remember ("was Firenze 1 the North exit or the South one?")
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Old July 26th, 2010, 03:15 PM   #22
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Some countries use street names for exit names, most prominently in the United States. While geographically very precise, they don't mean much for non-locales, as they don't indicate which cities they serve, especially when there is an extensive urban area. However, you can't name all the exits after the suburbs, for example there are over 1,000 exits in the Los Angeles metropolitan area alone.
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Old July 26th, 2010, 03:18 PM   #23
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Quote:
Originally Posted by LMB View Post
You find it sensible, because you're used to it. For us it's different.
Rarely there is one exit per city, and it's easier to remember Exit 373 than Bologna Xxxxxx, if you don't know the language.

Best, IMHO, though, would be Bologna 1, Bologna 2, etc. I haven't seen that system anywhere.
I guess the problem with that one would be similar to the one you have with sequential numbering - if another exit is added after the city it's fine, just +1 to the previous exit number... but what if you add an exit before Bologna 1? would it be Bologna 0? Then Bologna -1?
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Old July 26th, 2010, 03:24 PM   #24
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I agree with nerdly dood. The sequential numbering doesn't make sense at all, in a highway. The distance numbering makes more sense, but I still think it is not necessary. Moreover, if a piece of highway is redone (a variant, like Variante di Valico for instance), then the distances become wrong and you have to change all the signs from that point to the end of the highway.
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Old July 26th, 2010, 04:04 PM   #25
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Quote:
Originally Posted by ChrisZwolle View Post
Germany even numbers border crossings. The first actual exit in Germany is thus numbered "exit 2".
That is a misinterpretation. Border crossings aren't numbered at all. Assigning number 2 to the first junction correlates with the open end of the motorway at a border. The number 1 itself is reserved for motorway termini which the border crossing clearly isn't.
By the way Germany doesn't number exits but junctions. And so does the UK and Ireland.
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Old July 26th, 2010, 04:14 PM   #26
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A junction is an exit. Don't try to childishly push people to use British English. it's not mandatory on these forums, nor is this a linguistics forum.
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Old July 26th, 2010, 05:18 PM   #27
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Originally Posted by ChrisZwolle View Post
Some countries use street names for exit names, most prominently in the United States. While geographically very precise, they don't mean much for non-locales, as they don't indicate which cities they serve, especially when there is an extensive urban area. However, you can't name all the exits after the suburbs, for example there are over 1,000 exits in the Los Angeles metropolitan area alone.
I'd rather see an exit labeled for a major street than be tossed a list of neighborhoods and landmarks (like in France). (It may help that in the typical North American city, streets can run for many miles without changing names.) But with exits being numbered, this information is really supplemental anyway. I'm not sure what would "mean much for non-locals," who are going to have to look at a map or look up directions anyway. If I with my American habits looked at a street map of, I don't know, Nijmegen, I'd remember, okay, exit at x-straat. A Dutchman might look at the same map and remember, exit at such and such a neighborhood. I'd actually analogize navigating by street names to navigating by route numbers.

But I guess it's a function of what you're used to.... Which is why I find comparing different countries' systems more interesting than arguing about which one is better and pushing for uniformity. ;-)
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Old July 26th, 2010, 05:20 PM   #28
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A junction is an exit. Don't try to childishly push people to use British English. it's not mandatory on these forums, nor is this a linguistics forum.
Did I miss something?
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Old July 26th, 2010, 05:28 PM   #29
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Germany even numbers border crossings. The first actual exit in Germany is thus numbered "exit 2".
...
Distance-based exit numbering is slightly favored with the metric system, as the chance there are two exits within 1 kilometer is smaller than there are two exits within 1 mile, so you need less A / B suffixes.
Analogously to assigning number 1 to the border, American toll roads (at least those with ticket-based systems) technically number toll booths rather than exits. Usually, when you have an exit, you have a toll booth, so no problem. But at the west end of the Pennsylvania Turnpike (for example), before it converted from sequential numbering to distance-based (and when the ticket system went all the way to the Ohio border), "exit 1" was actually the toll booth near the Ohio state line. You weren't exiting the expressway there, just leaving the Turnpike's toll system (and entering Ohio's).

And one disadvantage of going metric with distance-based numbering would be four-digit numbers in places like Houston. I think four digits is excessive.

By the way, I know of two roads in the U.S. (I-19 in Arizona and Delaware Route 1) with kilometer-based exit numbering (or at least I-19 used to do that; I think they may have switched). I've read that Delaware 1 is going back to miles.
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Old July 26th, 2010, 06:25 PM   #30
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Exit signing in my neck of the woods.

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Old July 26th, 2010, 06:58 PM   #31
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Quote:
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And one disadvantage of going metric with distance-based numbering would be four-digit numbers in places like Houston. I think four digits is excessive.
On A-7 near Tarragona, with distance-based exit numbers and in metric, there are four digit exit numbers. The highest number is 1168, which I believe is world record. And it would go higher if they extend the motorway to near Barcelona.

PS: The last exit of I-10 in Texas, if they used metric instead of imperial units, would be numbered 1415!
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Old July 26th, 2010, 07:11 PM   #32
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in Croatia we ahve exit numbers since 2001. we have "german" system, so 2000 metres before exit there is large exit sign (or junctionm, they have different symbols) adn on some motorways (part of A1 and whole A6) there are those signes which sign approaching exit ramp (similar to those for railroad crossing).
exit numbers are also as german - order numbers, each motorway has exit no1 and further exits are numbered sequentially. junctions also count, and additional exits get letters A, B and so on.
for instance, at A3: exit 1, exit 2, junction 3, junction 4, exit 5, exit 5A, junction 6, exit 6A, exit 7...
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Old July 26th, 2010, 07:29 PM   #33
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So the "I know how many exits are left till mine" that somebody before talked about does not work. I mean, I have to exit at 12, and right now I'm passing 2: there could be more than 10 exits left, because there could be 3A, 3B, 4A and so on...

And what happens if a new exit is built between two existent ones? Does the whole numbering changes or does that exit become "4-bis" or something like that?

Last edited by g.spinoza; July 26th, 2010 at 08:04 PM.
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Old July 26th, 2010, 07:33 PM   #34
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And what happens if a new exit is built between to existent ones? Does the whole numbering changes or does that exit become "4-bis" or something like that?
in this case happen exits with letters so, it was planned to have 1, 2, 3, 4, 5... but after few years they've decided to build something between 4 and 5, and so we got 4A
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Old July 26th, 2010, 08:05 PM   #35
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Ah, sorry, I didn't read your post carefully.
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Old July 26th, 2010, 08:08 PM   #36
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Quote:
Originally Posted by g.spinoza View Post
... And what happens if a new exit is built between to existent ones? Does the whole numbering changes or does that exit become "4-bis" or something like that?
Adding a new exit on an existing motorway is not unheard of but it is rare. The cost of such an undertaking is high and there are rules/laws that prevent one from adding new exits willy-nilly. Arguably, every time a new exit needs to be added, it is a clear case of PPP (piss-poor planning) but I accept that sometimes there is no choice.

Generally, if there exists a risk of having to add a new exit, the pragamtic thing to do is this:
- add a letter such as A or B for unexpected new exits (the most common solution)
- anticipate and leave gaps in the numbering sequence at the planning stage
- adopt a defensive strategy, e.g. number exits using odd/even numbers for odd/even-named motorways, hence creating gaps by design.


Quote:
Originally Posted by g.spinoza
I mean, I have to exit at 12, and right now I'm passing 2: there could be more than 10 exits left, because there could be 3A, 3B, 4A and so on...
I'll give you some free advice - plan your trip ahead in a way that suits your particular driving style and navigation habits.
And I mean it in the nicest possible way.


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Old July 26th, 2010, 08:25 PM   #37
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Adding a new exit on an existing motorway is not unheard of but it is rare. The cost of such an undertaking is high and there are rules/laws that prevent one from adding new exits willy-nilly. Arguably, every time a new exit needs to be added, it is a clear case of PPP (piss-poor planning) but I accept that sometimes there is no choice.
Not necessarily PPP. There are many towns, especially in A14 Bologna-Taranto, which were too small to have their own exit back when the autostrada was built. Since 40 or more years those town have grown, and now they're getting their own exit (I think they're planning 5 or 6 new exits on A14)

Quote:
I'll give you some free advice - plan your trip ahead in a way that suits your particular driving style and navigation habits.
And I mean it in the nicest possible way.
I always do. I was just wondering why many nations consider exit numbers so important, and therefore I was asking. In the nicest possible way
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Old July 26th, 2010, 08:45 PM   #38
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South Africa uses distance-based exit numbering from the point of origin (usually the most southerly or westerly point). The catch is that exit numbers reset on the pre-1994 provincial borders - does sound confusing, but since all the exit number reset points are on rivers, it's not so bad.

This does however mean that the N2 in East London has an exit number 1060!
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Old July 26th, 2010, 08:47 PM   #39
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Quote:
Originally Posted by ChrisZwolle View Post
Some countries use street names for exit names, most prominently in the United States. While geographically very precise, they don't mean much for non-locales, as they don't indicate which cities they serve, especially when there is an extensive urban area. However, you can't name all the exits after the suburbs, for example there are over 1,000 exits in the Los Angeles metropolitan area alone.
Usually there is signage to tell you what city a group of streets serve you'll see a sign like this: CITY NEXT XXX EXITS with the streets sometimes be listed below



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Originally Posted by Penn's Woods View Post
And one disadvantage of going metric with distance-based numbering would be four-digit numbers in places like Houston. I think four digits is excessive.
.
I don't see big deal between 3 or 4 digit exit numbers
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Old July 26th, 2010, 11:11 PM   #40
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Exits in Canada are distance based. In Ontario, highways with several exits within a short distance are not numbered. In these cases the highway is usually short enough not to merit them. In the case of the 427 which will eventually be extended the exits are being consolidated as part of the overhaul of the highway so that a numbering system can be put in place.

The issue with several exits within a prescribed distance usually is not a problem when using kilometres over miles since a kilometre is shorter than a mile it's less likely that you'd get more than one exit within that span. In the event there are two exits within 1 km the second exit is given the following number if it is for a different street. Generally, exits are given the closest whole number based on the mileage posts along the highway. With co-signed higways the older highway's number is used on the shared segment and then when they separate they each continue using their respective mileage counts.

Driving on the New York Thruway where exits are sequentially numbered was alway confusing. Looking at the toll ticket told me I had 10 exits to go, but I had no idea how far and how long that would take without referring to a map. The exits on the Thruway are generally widely spaced, so it could be a while before you could count off the next exit.
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