The conclusion was added to the first post about a month ago. I will be putting this up for a vote as soon as I can make the poll.
Our goal in the naming of ramps has always been to match road signage as directly as possible
. This makes both editing and navigation clear
, and non-ambiguous
. You hear it on your speaker, you see it on your phone, and you read it on the sign, word for word.
In essence, this proposal is a standardized, compartmentalized naming system for ramps in the United States. I will give examples for every usage, but every example is a direct result of the standard system.
Every ramp name, as signed, has elements in one or more of three essential component groups:Exit numbers
,Highway designation shields
, andRoad / City names
The component groups are to be separated by a colon (:). The colon gives a long pause in text-to-speech (TTS) and is the most logical and compact punctuation mark for its task, implying relation but establishing a hierarchy (visual).
For a given ramp, each group may comprise multiple items or may be empty. If a group is empty, the group is omitted. If a group contains more than one item, the items within the group are to be separated by a slash (/). The slash is the most logical punctuation mark for its task, implying a list of alternatives which are more or less equivalent in importance.
Represented graphically, the essential formula is this:[exit number]: [shields]: [names]
[exit number]: [shield] / [shield]: [name] / [name] / [name]
for an example with two shields and three city/street names.
As before, if no exit number exists, the shield or name will be preceded with "to ".
Here are a number of examples, presented in bold
with the old style in italics
(if different) and the breakdown to essentials in normal text. Some street view links to signs are included as well.to I-10 E
-- to shieldto I-10 E: New Orleans
-- to I-10 E / New Orleans
-- to shield: nameto I-310 N / LA-3127 N: Donaldsonville / New Orleans
-- to I-310 N / LA-3127 N / Donaldsonville / New Orleans
-- to shield / shield: name / name -- http://g.co/maps/pgcx2to Loyola Ave
-- to nameto Causeway Blvd S
-- to nameto Carondelet St / St Charles Ave
-- to name / name -- http://g.co/maps/hvxgtto Causeway Blvd N / Mandeville
-- to name / nameto Clearview Pkwy S / Huey Long Bridge
-- to name / nameExit 16: Diamondhead
-- exit: nameExit 228: Causeway Blvd / Mandeville
-- exit: name / nameExit 234A: US-90 Business: Westbank
-- Exit 234A: US-90 Business / Westbank
-- exit: shield: nameExit 220: I-310 S: Boutte / Houma
-- Exit 220: I-310 S / Boutte / Houma
-- exit: shield: name / name -- http://g.co/maps/erw3rExit 246A: I-510 S / LA-47 S: Chalmette
-- Exit 246A: I-510 S / LA-47 S / Chalmette
-- exit: shield / shield: nameExit 246B: LA-47 N: Little Woods
-- Exit 246B: LA-47 N / Little Woods
-- exit: shield: nameExit 246A-B: I-510 S / LA-47: Chalmette / Little Woods
-- Exit 246A-B: I-510 S / LA-47 / Chalmette / Little Woods
-- exit: shield / shield: name / name -- http://g.co/maps/uy7w5Exit 2: SR-607: NASA John C Stennis Space Center / Waveland
-- Exit 2: SR-607 / NASA John C Stennis Space Center / Waveland
-- exit: shield: name / name
Anything underlined and red (typically slashes: /
) was not included in the original standards but has since been hastily added. For instance, the original standard called for "to I-10 E New Orleans".
Everything within the parts follows from the sign itself and using our existing naming standards. A split-numbered exit written on its signs as "Exit 246A-B" is to be labeled "Exit 246A-B
", not "Exits 246A-B", "Exit 246A/B", "Exits 246A, 246B", "Exits 246A-246B", "Exit 246A - B", or any other way.
Exits without numbers are treated the same way as entrance ramps. There are examples of both in the list.
Additionally, this proposal includes one entirely new naming convention: pathfinder
or reassurance signs
Typical exits come from the rightmost lanes of an interstate highway. Sometimes, this isn't the case, a reality that can be especially problematic when an exit on the left takes up as many or more lanes as the continuation of the interstate does. Here are a few:I-10 E: New Orleans Business District
-- http://g.co/maps/u2n5gI-10 E: Slidell
-- http://g.co/maps/ztzs7I-10 E: Bay St Louis
This is the only case where the "to" is omitted with no exit number. In this case, "to" is misleading, since you are already on the indicated road and wish to remain on that road.
This is not necessarily required for every case in which a pathfinder is used; they're relatively common. When there are many lanes of travel going to an exit, especially when the exit is on the left and/or to another freeway, it's certainly worth considering.
That's basically it. There are a few intricacies for making the pathfinders work and for exits with separate signs but one ramp (at first) that I may include later. This is effectively what the OP of the poll will say, though, once I am able to create it.