[Talk-us] Pennsylvania's quadrant routes

[Minh Nguyen]

On 2015-01-19 01:30, Minh Nguyen wrote:
> On 2015-01-19 00:50, Paul Johnson wrote:
>> Are they actually separate networks, though?  Just because there's more
>> digits doesn't a different network make.
>
> What distinguishes the various networks that a given agency maintains?
> For our purposes, I think we're most interested in:
>
> 1. Significant differences in signage (signage type, shield designs,
> bannered routes)
> 2. Potential overlaps in numbering
>
> Given the extra digits, #2 is unlikely, but the quadrant routes are
> signed very differently than ordinary state routes. It looks like
> they're only indicated as secondary information on out-of-the-way
> mile-markerish signs. (It also appears that conventionally one is
> prefixed "PA" while the other is prefixed "SR".)
>
> For example, here's a directional sign for PA 443:
>
> https://www.flickr.com/photos/dougtone/4176740362/
>
> There's a quadrant route number on the marker beneath it. It's the
> four-digit number next to "SR", above "210". Unlike "PA 443", "SR 3009"
> is inappropriate for how OSM clients use the `ref` tag. It might be
> worth mapping inasmuch as bridge inventory numbers are worth mapping,
> but I agree with James that we should keep mappers from conflating the
> two systems. And if the solution starts with `ref:penndot`, there's no
> need to square that with route networks in other states. :-)

Forgot to mention: "3009" was just a guess based on [1]. My vision isn't 
*that* good.

[1] https://en.wikipedia.org/wiki/PA_443

-- 
minh at nguyen.cincinnati.oh.us