Travel Mapping

Highway Data Discussion => Updates to Highway Data => Solved Highway data updates => Topic started by: mapcat on August 22, 2016, 11:56:17 am

Title: QC: A-35 northern end
Post by: mapcat on August 22, 2016, 11:56:17 am

Does this autoroute actually end at the signal north of the A-10 interchange?

Signage heading north:
https://www.google.com/maps/@45.4094977,-73.3150833,3a,75y,10.48h,90.79t/data=!3m6!1e1!3m4!1sAFUSvYqNozKsyLtG_E_EKg!2e0!7i13312!8i6656!6m1!1e1


55km post north of the interchange:

https://www.google.com/maps/@45.4113392,-73.3153672,3a,75y,189.87h,87.63t/data=!3m6!1e1!3m4!1sRZWW_RI8bhgfg1Er3hTiLA!2e0!7i13312!8i6656!6m1!1e1

Title: Re: QC: A-35 northern end
Post by: oscar on August 22, 2016, 01:00:53 pm

I went through that interchange several times in late 2014, trying to figure out the endpoint. I don't remember why, but do remember concluding that A-35 doesn't extend north of A-10.

Title: Re: QC: A-35 northern end
Post by: yakra on August 31, 2016, 11:58:44 am

Here's what the GeoBase 7.0 shapefiles, dated 2014-08-04, show. Color coded by the RTNUMBER1 attribute.
Interpret as you see appropriate, and know that GeoBase shapefiles shouldn't necessarily be taken as gospel anyway.

Title: Re: QC: A-35 northern end
Post by: oscar on August 31, 2016, 09:39:06 pm

A few quick thoughts from the road:

-- adding an endpoint for Rue Patrick-Farrar would only add a crummy 0.18 mi.

-- that point is within the "footpoint" of the A-10/A-35 interchange, especially since WB A-10 traffic headed to SB A-35 has to go briefly on Rue Patrick-Farrar to get to A-35

-- GMSV shows the loop ramp from A-10 EB is signed as going to "Chambly", rather than to A-35 north; signage on both WB and EB A-10 indicates A-35 goes only south from A-10

So I'm still not convinced we need to do anything here.

Title: Re: QC: A-35 northern end
Post by: yakra on September 01, 2016, 01:47:58 pm

I agree. 1 point per interchange, etc. Leaving as is ought to be fine

Title: Re: QC: A-35 northern end
Post by: mapcat on September 04, 2016, 09:40:13 pm

Fine with me. The only reason I submitted this in the first place is due to stuff like the western end of I-395 (ME). Maybe there's a distinction that I don't see.

Title: Re: QC: A-35 northern end
Post by: froggie on September 06, 2016, 02:54:27 pm

Here, a distinction can be made by comparing the relevant interchange.  For A-35, because of the westbound A-10 offramp, that northern "endpoint" is considered within the footprint of the interchange.  For I-395, the intersection with US 2 is outside the footprint of the 95/395 interchange (albeit just barely).

Title: Re: QC: A-35 northern end
Post by: oscar on September 06, 2016, 10:55:37 pm

Also, the west end of I-395 is at a numbered route, US 2. That other route needs, and has, a waypoint for its intersection with I-395, separate from the I-95/I-395 waypoint.

Had the Rue Patrick-Farrar intersection been with a numbered provincial route (other than A-10), I would've included a point there, in anticipation of a future QC provincial route set.