Author Topic: jpne: Japan Expressways  (Read 1283 times)

0 Members and 1 Guest are viewing this topic.

Offline si404

  • TM Collaborator
  • Hero Member
  • *****
  • Posts: 1452
  • Last Login:Today at 02:58:58 pm
Re: jpne: Japan Expressways
« Reply #15 on: April 12, 2021, 06:05:42 am »
Should all u-turn-only exits be included?
I would like to add them, though there's no should about doing so.

Quote
Is N# how national highways should be referenced?
It's how I have referenced them - it seemed logical with the E for Expressways. Have you another suggestion?

Quote
Did you use E1A, E1 and E20 as names because their numbers (1, 4-1, 6) did not match the normal exit number sequence?
Yes. Thoughts from the floor on this.

Alternatively I could call them 1(E1A), 4-1(E1) and 6(E20) - as numbered exits from another route's exit numbering system, but that strikes me as rather pointless.

Offline si404

  • TM Collaborator
  • Hero Member
  • *****
  • Posts: 1452
  • Last Login:Today at 02:58:58 pm
Re: jpne: Japan Expressways
« Reply #16 on: April 12, 2021, 06:07:48 am »
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.
I found it clear. No plans to split Japan at this time. We'll cross that bridge if we come to it.

Offline nezinscot

  • Newbie
  • *
  • Posts: 21
  • Last Login:Today at 01:00:06 pm
Re: jpne: Japan Expressways
« Reply #17 on: April 12, 2021, 12:23:24 pm »
Thanks for the clarifications.

I decided to work my way north - Kyushu to Hokkaido.  I thought things would be simpler down south. They aren't.  Here are a few updates for some of the shorter Kyushu expressways.

E77Kum
a) has new exits IC2 and IC3

E77Tak - new road
a) There is an additional section of E77 open. It is a tunnel between N218 in Takachiho and a farm road that leads to N218. I suggest using Tak(achino) as the name -  it's a popular tourist site.

E96
a) E96 branches just before exit 11-3. Branch A goes to P113. Branch B goes to P235 and is part of the current entry for E96.  A new entry for Branch A is needed.
b) I would use E34 instead of 11 as the first exit name.  11 is the exit number on E34 for getting on E96.

E97
a) You might be able to use the IC numbers instead of route numbers:  N10(1), ToN213(Jct2), P4(3).  E97 is made up of three pre-existing roads. I don't know if the numbers being sequential is a fortuitous accident, or not.
b) Exit IC4 does not have a waypoint. It goes to P404.

E98
a) E98 starts at IC5, not IC4-1. The highway between IC4-1 and IC5 appears to be a branch of E10.  It is definitely a part of the Miyazaki Expressway.  I used GSV to look for E10/E98 signage, but didn't find any in the 2017-18 street views.  The Japanese wikipedia page for the Miyazaki IC (5) says that it is on E10 and that E98 is a connecting road.
b) We probably need a new entry for the E10? branch between IC4-1 and IC5.

Offline nezinscot

  • Newbie
  • *
  • Posts: 21
  • Last Login:Today at 01:00:06 pm
Re: jpne: Japan Expressways
« Reply #18 on: April 12, 2021, 05:00:21 pm »
More Kyushu.

E3AYat
a) The existing exit numbers should be 1 thru 5 (1-1 became 2).
b) The road has been extended and now ends at IC6.

E3AIzu
a) The road now starts at IC9.

E3
a) There are four new ICs to add:  4-2, 14-1, 19-1, and 25-2.


Offline nezinscot

  • Newbie
  • *
  • Posts: 21
  • Last Login:Today at 01:00:06 pm
Re: jpne: Japan Expressways
« Reply #19 on: Yesterday at 12:33:49 pm »
The rest of Kyushu, plus Okinawa

E10
a) Exits 10(Hig) thru 13(Hig) are actually numbered 9-1 thru 9-4 (verified with GSV). Because of this there is probably no need to use the (Hig) and (Oita) indicators in the exit names.
b) Need to add exits 10-1, 24-1, 28-1.
c) Need to add exit 3-1(Miy).

E34
a) Consider using E10 as the exit name instead of 10(Oita)
b) Add new exit 9-1(Oita)
c) Add new exits 3-1(Nag) and 9-1(Nag)
d) The 1(Nag) exit was confusing when I looked at it on GSV. I can see why you used 1 and 1a. You could alternatively use N3 and N34 which is what the signs on E34 use.

E35
b) The exits are listed low to high. Should they be flipped? The E35 Japanese wikipedia page lists exits starting in Fukuoka and ending at E34. E35Fuk, E35Mat, and E35Kar use the order wikipedia uses.

E35Fuk
a) Consider using FEC as the exit name instead of Fuk
b) The road ends at P573, not P12.  Move the P12 point to P573 and rename it.  Or name it N202 because that is the continuing road.
c) The other exits all connect to N202 which follows underneath the expressway, but the town names are less confusing that using N202A thru N202D, plus they mirror the exit signs on the expressway.  I would also use Ima(juku) instead of P561; P561 is not listed on the exit sign.

E35Kar
a) Consider using the IC numbers (24 thru 18) instead of road names.

E35Mat
a) Consider using the IC numbers (14 thru 11) instead of road names.

E58 (Okinawa)
a) Need to add exit 3-1
b) At exit 1-1, there is a long exit west to P82. I could not find any indication on the web that this long exit is considered a separate branch of E58, so what exists now is probably OK.

E78
a) Consider using E3 as the exit name instead of 25-1 which is the E3 exit number for E78

E78Miy
a) Consider using E10 as the exit name instead of 4-1 which is the E10 exit number for E78Miy


Offline nezinscot

  • Newbie
  • *
  • Posts: 21
  • Last Login:Today at 01:00:06 pm
Re: jpne: Japan Expressways
« Reply #20 on: Today at 10:27:46 am »
Hokkaido expressways

E5
a) The exit numbering is now sequential S to N, from 6 to 48.  20(S) is 6, 13(N) is 48, 1 is 32.
b) Need to add exit 21 - between 7(S) and 6(S)
c) Need to add exit 27 - between 4(S) and 3(S)
d) Need to add exit 31 - between 2(S) and 1
e) Need to add exit 33 - 0.5 km east of the E5, E5A junction. The exit is almost part of the junction. Coming from the north on E5, exit 33 goes straight to N274, while bearing left is exit 32 which continues E5.  Only the latest GSV shows the new exit numbers.
f) Need to add exit 40 - between 7(N) and 8(N)

E5Toy
a) The Japanese wikipedia page for the road says that as of 2020 the exit numbers are no longer used. OpenStreetMaps uses IC names without numbers. But GSV from 2018 shows all four exit numbers in use. If you decide to follow OSM and wikipedia, these names could be used for the exits
1: P121
2: P84
3: P923
4: N40

E5A
a) Use E5 instead of 1-1.
b) Exit 4 is missing. The waypoint for exit 3 is located between 3 and 4. Add 4 and move 3 east of P231.  3 (exit westbound) and 4 (exit eastbound) are a pair, but they are numbered separately.
c) The waypoints for 1 and 2 are not positioned at the exits. 2 is too far NW and 1 is too far SE. (Exits 1 and 2 are similar to 3 and 4.)

E5AKur
a) The Japanese wikipedia page for the road says that as of 2020 the exit numbers are no longer used. OpenStreetMaps uses IC names without numbers. GSV from 2018 shows the exit numbers in use.  If you decide to follow OSM and wikipedia, these names could be used for the exits
1: P344
2: N5

E38Kus
1) The road ends at exit 20, which could be named E44 because E44 begins at that point.

E44
a) This road needs to be added. It begins at exit 20 at the end of E38Kus. It has two exits - E38 (20) and 21.

E44Nem (for Nemuro, at the eastern tip of Hokkaido)
a) This road needs to be added. It has two exits - N44_S and N44_N.

E59
a) Exit 1 could be called E5.



Offline nezinscot

  • Newbie
  • *
  • Posts: 21
  • Last Login:Today at 01:00:06 pm
Re: jpne: Japan Expressways
« Reply #21 on: Today at 12:59:05 pm »
Shikoku - Honshu connector expressways

E2Kim - new route
a) E28 does not extend to E2. A short branch of E2 heads south to connect to E28.
b) There are two waypoints - E2 (IC2 on E2) and E28 (IC1)
c) Kim is from the road name - Kimi Branch Line

E28
a) E28 does not extend to E2. It starts at IC1, which could be named E2Kim
b) New exit 7-1 needs to be added.
c) New exit 4-1 is part of the exit 4 complex at the Awaji Highway Oasis. 4-1 allows entry from P157 to the service area. Its location is WNW of the electric vehicle charging station at the north end of the Oasis parking lot.

E2Kur - new route
a) E30 does not extend to E2. A short branch of E2 heads south to connect to E30.
b) There are two waypoints - E2 (IC16 on E2) and E30 (IC1)
c) Kur is from the road name - Kurashiki Hayashima branch line

E30
a) E30 does not extend to E2. It starts at IC1, which could be named E2Kur
b) Exits 3-1, 3-2, and 3-3 only allow entry to local residents and delivery vehicles (and the GSV vehicle). The toll booths at the exits require a separate payment card for islanders only.