Travel Mapping

Highway Data Discussion => Updates to Highway Data => Topic started by: the_spui_ninja on May 13, 2019, 06:47:04 pm

Title: NE: Interstate ending exit numbers
Post by: the_spui_ninja on May 13, 2019, 06:47:04 pm
I recently clinched all the Nebraska interstates, and noticed that Nebraska marks all of its Interstate termini with I-80 exit numbers (e.g. I-76's only exit in NE is 102, I-180 goes 2, 1, 401, etc.). Currently in the HB all of these just end at "I-80". Should this be updated to reflect the situation on the ground?
Title: Re: NE: Interstate ending exit numbers
Post by: rickmastfan67 on May 14, 2019, 12:48:43 am
Verified the '102' for I-76. https://goo.gl/maps/TCXc6dufioukFNxS9
Verified the '401' on I-180. https://goo.gl/maps/8LJhEuUHwXrfQKTDA

I would think we should have those exit numbers in the HB.  Seems weird though, but they are indeed posted. :-\
Title: Re: NE: Interstate ending exit numbers
Post by: the_spui_ninja on May 14, 2019, 11:24:49 am
'446' for I-680: https://goo.gl/maps/kimaQRcD37ZWVpXN8 (https://goo.gl/maps/kimaQRcD37ZWVpXN8)
'452' for I-480: https://www.google.com/maps/@41.2319541,-95.9551588,3a,75y,186.92h,96.24t/data=!3m6!1e1!3m4!1sflbvMhVEfR4TDTsF6cB7OA!2e0!7i13312!8i6656 (https://www.google.com/maps/@41.2319541,-95.9551588,3a,75y,186.92h,96.24t/data=!3m6!1e1!3m4!1sflbvMhVEfR4TDTsF6cB7OA!2e0!7i13312!8i6656) (it wouldn't shorten that one for whatever reason)
Title: Re: NE: Interstate ending exit numbers
Post by: yakra on May 16, 2019, 02:06:33 pm
I'd say these fail the "If the highway is a freeway and has a unique exit numbering system based on its own designation without the exit numbers restarting" test (http://cmap.m-plex.com/tools/manual_wayptlabels.php).
Seems we're falling down at least as far as "If there is more than one exit number sequence for a highway and no concurrent route to explain it"
Title: Re: NE: Interstate ending exit numbers
Post by: Markkos1992 on May 28, 2021, 11:12:28 am
I would go without exit numbers on these based on the past I-476 thread: https://forum.travelmapping.net/index.php?topic=2589.0
Title: Re: NE: Interstate ending exit numbers
Post by: si404 on May 28, 2021, 12:52:37 pm
test (http://cmap.m-plex.com/tools/manual_wayptlabels.php).
I don't think that http://cmap.m-plex.com has worked for years. ;)

I think you were going for this (https://travelmapping.net/devel/manual/wayptlabels.php#exitnumbered).
Title: Re: NE: Interstate ending exit numbers
Post by: yakra on May 28, 2021, 03:16:12 pm
CHM was what we had at the time I wrote the post.
Title: Re: NE: Interstate ending exit numbers
Post by: yakra on November 24, 2021, 11:27:03 am
Are there similar situations in other states regions?
Title: Re: NE: Interstate ending exit numbers
Post by: Markkos1992 on November 24, 2021, 11:33:47 am
Are there similar situations in other states?

I definitely cannot think of any offhand. 
Title: Re: NE: Interstate ending exit numbers
Post by: yakra on November 24, 2021, 01:07:16 pm
Here's a weird one: AR I-430 (https://travelmapping.net/hb/showroute.php?r=ar.i430&lat=34.664495&lon=-92.403635&zoom=16).
The end was signed as Exit 129 (https://www.google.com/maps/@34.6647104,-92.4039106,3a,38.4y,156.11h,103.88t/data=!3m10!1e1!3m8!1saMtat5rBmUiDlsYBgUeH2Q!2e0!5s20070801T000000!7i3328!8i1664!9m2!1b1!2i40) all the way back, formerly just labeled I-30 (https://github.com/TravelMapping/HighwayData/commit/0a06d27e750464d9b3bb8dcc5ea89e28492ebb27), Nebraska-style.
It already had an Exit 1, and rather than add Exit 0 or get into more alphabet soup for Exit 1 or even 129, ARDOT chose to add Exit 128.
Needing 128(30) now, there's not much justification for keeping I-30 rather than 129(30).
Title: Re: NE: Interstate ending exit numbers
Post by: the_spui_ninja on November 24, 2021, 07:12:04 pm
Here's a weird one: AR I-430 (https://travelmapping.net/hb/showroute.php?r=ar.i430&lat=34.664495&lon=-92.403635&zoom=16).
The end was signed as Exit 129 (https://www.google.com/maps/@34.6647104,-92.4039106,3a,38.4y,156.11h,103.88t/data=!3m10!1e1!3m8!1saMtat5rBmUiDlsYBgUeH2Q!2e0!5s20070801T000000!7i3328!8i1664!9m2!1b1!2i40) all the way back, formerly just labeled I-30 (https://github.com/TravelMapping/HighwayData/commit/0a06d27e750464d9b3bb8dcc5ea89e28492ebb27), Nebraska-style.
It already had an Exit 1, and rather than add Exit 0 or get into more alphabet soup for Exit 1 or even 129, ARDOT chose to add Exit 128.
Needing 128(30) now, there's not much justification for keeping I-30 rather than 129(30).
And on the other side of the Little Rock metro, you have I-440 (https://www.google.com/maps/@34.7136265,-92.2648857,3a,75y,276.01h,86.66t/data=!3m7!1e1!3m5!1sYQX5GMDK0ubwH3w4AQTmnA!2e0!5s20070801T000000!7i16384!8i8192) using Exit 138 from I-30 while I-530 uses Exit 1. Additionally, I-630 uses Exit 1 for a ramp that doesn't intersect I-30 while using 139B&C for the ramps that do intersect I-30 (why do you hate Exit 0 Arkansas (https://www.google.com/maps/@34.7345487,-92.2663931,3a,15y,119.28h,96.82t/data=!3m6!1e1!3m4!1sWBwa3vB5lGOupC47nwGv4w!2e0!7i16384!8i8192)). It seems like this is Nebraska and Arkansas' way to avoid using Exit 0s (although Arkansas is very inconsistent).
Meanwhile, in Memphis, I-40 starts out with a bunch of suffixed Exit 1s then starts a sequence that continues onto I-240 while I-40 takes over the Sam Cooper Boulevard numbers (here (https://travelmapping.net/hb/showroute.php?r=tn.i040&lat=35.163775&lon=-89.919920&zoom=13), probably a holdover from when Sam Cooper was supposed to be I-40).

I think overall for these now 6 cases (I-180 NE, I-480 NE, I-680 NE, I-440 AR and I-630 AR), the ##(XX) format seems to fit this to a T, since that's what anyone will see from the road (would avoid the question of "I thought this was Exit 401, why does the HB just say "I-80"?) and it's an exit number sequence from another exit numbered road.