Author Topic: AZ: US 89 south terminus in Flagstaff  (Read 383 times)

0 Members and 1 Guest are viewing this topic.

Offline US 89

  • Jr. Member
  • **
  • Posts: 83
  • Last Login:Today at 01:21:27 pm
AZ: US 89 south terminus in Flagstaff
« on: January 30, 2020, 11:40:35 am »
TM currently has the US 89 south end at its junction with BL-40/US 180 at Country Club Drive. While this is where the End sign is located, there is a legitimate argument to move it west to the junction with old US 66. The signage for westbound 66 at that intersection, including both the shields and street blade, suggests US 89 begins to the east there.

But perhaps the strongest argument for moving it would be the AZDOT route log. It doesn't explicitly state the location of the terminus because the portion in city limits appears to be locally maintained, but it does give the Townsend-Winona Road intersection as milepost 2.37, which puts milepost 0.00 exactly at the Historic 66 intersection.

Offline neroute2

  • TM Collaborator
  • Hero Member
  • *****
  • Posts: 638
  • Last Login:November 18, 2020, 06:53:54 pm
Re: AZ: US 89 south terminus in Flagstaff
« Reply #1 on: January 30, 2020, 12:47:39 pm »
How does this compare to the 2005 log? https://azdot.gov/sites/default/files/2019/05/2005shslog.pdf
I'm on my phone so I can't do a detailed comparison.

Offline US 89

  • Jr. Member
  • **
  • Posts: 83
  • Last Login:Today at 01:21:27 pm
Re: AZ: US 89 south terminus in Flagstaff
« Reply #2 on: January 30, 2020, 05:14:05 pm »
The 2005 log does include the mileposts less than 1.79, and it states that that segment was transferred to the city of Flagstaff in January 2005. The zero milepost is listed as "Begin U 089 at SB040(4)", and there is a point at MP 0.32 that reads "(EB) SB040(4) NB(on)", which reads to me like there's a brief concurrency with Business 40 before that splits off back to I-40. Mileages outside Flagstaff are the same in both the 2005 and 2013 logs.

Interestingly that 0.32-mile figure is a little bit off from what I'm measuring on Google Maps, but a detailed mileage analysis there is difficult because that junction has been significantly reconfigured since the 2005 route log was made - it was reconfigured from a full trumpet to a standard intersection in 2007.

Offline neroute2

  • TM Collaborator
  • Hero Member
  • *****
  • Posts: 638
  • Last Login:November 18, 2020, 06:53:54 pm
Re: AZ: US 89 south terminus in Flagstaff
« Reply #3 on: January 30, 2020, 05:29:51 pm »
I bet mile 0 is southwest of the intersection because that's where the trumpet ramps used to begin/end. Not because old US 66 is there.

Offline US 89

  • Jr. Member
  • **
  • Posts: 83
  • Last Login:Today at 01:21:27 pm
Re: AZ: US 89 south terminus in Flagstaff
« Reply #4 on: January 30, 2020, 05:52:34 pm »
Found an ArcGIS milepost map: http://www.arcgis.com/home/webmap/viewer.html?url=https%3A%2F%2Fgis.azgeo.az.gov%2Farcgis%2Frest%2Fservices%2FAdot%2FMileposts%2FMapServer&source=sd

It's not easy to navigate, but there is a milepost exactly at the Historic 66 intersection, which is named "M419.50 (Beg Seg N Flag CL)" on route "U 089RETIRED 1". It appears to be the southernmost US 89 milepost, and from what I can tell, the word "retired" just means the state doesn't maintain it anymore - there are some retired mileposts on BL-40 as well.

I bet mile 0 is southwest of the intersection because that's where the trumpet ramps used to begin/end. Not because old US 66 is there.

I considered that, but the N-to-W trumpet ramp ended slightly west of the 66 intersection, while the E-to-S ramp was a bit east. It still wouldn't explain the exact distance I get with the Google Maps distance tool.
« Last Edit: January 31, 2020, 09:55:23 am by US 89 »