jpne: Japan Expressways

[yakra]

E6: 9-1(Job)-> 9(Job) / X659146 -> 9-1(Job)
E9: Not sure if the E88 concurrency is a thing. Kyoto Tramway Expressway / Gyeonggi bypass / But then again... Wikipedia?
E13: looks like it should end at the point currently labeled ToN107, based on mileage figures from [link]
E17: X299608 -> 17-1

[si404]

This system has been updated and is ready for review

[michih]

I'll do the review once the English routes of gbnb will be done.

[michih]

Since no specific source is indicated I assume that wikipedia is the source.
The box at bottom does not indicate E16, E31, E82, E83, E84, E85, E88, E89, E90, E91, E92, E93, E94, E96 and E98. The article seems to be outdated 
The urban expressways from wikipedia are not in HB (I didn't check all).

First look what is missing in HB:
- There is a E1A north of Osaka from E2/E2A junction to the east.
- Just south of it is a route indicated being "7".

Both are indicated on OSM and GM with green shields like the other routes.

"7" has a different shield on GM and GSV.
Another example that the rectangle green signs seem to be the criteria.
Also here.
However, the E1A missing in HB has the correct(?) rectangle shield.

The national highways have a blue shield.

The expressways around Osaka like "7" with the other green shield seem to belong to Hanshin expressways - one of the "urban expressways" (which are networks).

=====================

Is E1A missing on purpose?
Is the rectangle shield the criteria for routes to be included?
What's the exact reason that we exclude the other expressways indicated with the different green shield? Should we rename the system to "Japan National Expressways" (and add the additional urban expressway systems for the other networks anywhere down the road)?

[si404]

Is E1A missing on purpose?

Of course not. You'll note that there isn't a junction at the E1 - there would be if it was deliberate. When I drafted the system it wasn't open. When I went back to look for routes, it got buried in the all urban expressways and mapped-as-expressways-but-aren't-formally-such around it.

Is the rectangle shield the criteria for routes to be included?

Not really. It was more that the shield rather than a prefix excluded the urban ones.

What's the exact reason that we exclude the other expressways indicated with the different green shield? Should we rename the system to "Japan National Expressways" (and add the additional urban expressway systems for the other networks anywhere down the road)?

Because they are not part of this system, but their own ones. We'll call the system a latinised version of the Japanese.

[michih]

OK. Should I wait till you've added E1A (and maybe other missing routes - It took me less than 60 seconds to find this and I didn't checked other locations) or should I already start the review?

[nezinscot]

I would like to volunteer to peer-review jpne.  michih suggested that I volunteer for this as he will not be able to get to it for some time. 

I have read the developer's guide and looked at some jpne entries to get a feel for Japanese expressway routing.  I can read Japanese, so I will be able to access source materials if there are any available.

There aren't any Japan entries in credits.php, so I took a short look at the ministry website.  I can find lists of roads and GIS maps that seem up to date, but so far no detailed explanations of routing.  Also found: bureaucratic Japanese is awkward and hard to decipher - my formal language skills need work.

[yakra]

Do you have a link to the GIS maps?

[si404]

I just used the general sources like wikipedia and mapping for creating this system.

[nezinscot]

I was looking at the disaster information map on the ministry website.

https://dimaps.mlit.go.jp/dimaps/4/WebContent/html/map/main/mainMap.html?&t=0-1-0&ll=37.57152159224726,140.6538391113281&z=11

The manual is here:
https://dimaps.mlit.go.jp/dimaps/index.html

If you click on the first button in the upper left corner, a popup of options appears. The fourth folder down is roads. Open it and the second option is highways. I haven't explored much further than this.

[nezinscot]

I think this is the base for DIMAPS.
https://www.gsi.go.jp

I checked the GSI map for the sections of E55 in Tokushima and E45 in Iwate which opened a few weeks ago.  They are present on the GSI map.

[nezinscot]

http://altcva.main.jp/pref/

This is a non-official route viewer for Japanese expressways, national roads, and prefectural roads. You choose what to look at using the panel in the upper left corner. The first two choices are expressways and national roads. The other entries are the prefectures, listed north to south. Click on a prefecture to see a list of its prefectural roads.  The selector panel says that all route map data is from OpenStreetMap.

[nezinscot]

I reviewed the C routes in Tokyo.

CA, C3, and C4 cross prefectural borders. Should there be points at the borders?


CA:

a) The Umi point is just a parking area that allows U-turns. Should all u-turn-only exits be included? There is an unmarked similar exit on C4.

C3:

a) C3 extends to E51. Exits 85, 86, 90(E14), 91 and 92(E51) need to be added.
b) The point for exit 83 is north of the actual exit.
c) E14 needs to add exit 1-1 for C3.
d) E51 exit 1 intersects C3.
e) SEB exit E51 intersects C3.

C4:
a) Exit 32-1 is a parking area that allows u-turns. Should it be included?
b) Is N# how national highways should be referenced?
c) Did you use E1A, E1 and E20 as names because their numbers (1, 4-1, 6) did not match the normal exit number sequence?

C4Mob:
a) Need to add exits 101-1 and 102-1. They are new SICs.
b) Exit 92 is not labeled 92 on road signs. It is marked as shuuten, which just means "end point".

[michih]

CA, C3, and C4 cross prefectural borders. Should there be points at the borders?

According to which rule?

[nezinscot]

I apologize for being unclear about why I asked this question.  I don't know the future plans for Japan - divided or undivided.  If Japan is an undivided country I don't need to worry about  prefectural boundaries.

The other questions are for me to know more about what exits should be included and how expressway waypoints are named.