MI: US-12 fixes

[rickmastfan67]

Found some minor issues for the route that need to be addressed.

1) Found a missing interchange @ Greenfield Road.  It's between the 'MI39' & 'I-94(210A)' points.
2) EcoRd, WilRunAir, & WiaRd need to be re-centered, as US-12 shrunk in that area from a dual-carriageway to just use the 'former' EB alignment.  Also the 'WilRunAir' point will need to be marked as 'closed'.
3) Would add a point @ Brooklyn Highway (just to the West of 'MI50').  Reason is because of the big NASCAR track there of Michigan International Speedway.   The 'MI50' point could also use a recenter too.

[mapcat]

Thanks. https://github.com/TravelMapping/HighwayData/pull/4025

[rickmastfan67]

I wouldn't have deleted the 'WilRunAir' point, as that was a full interchange.  Should just be marked as closed.

[mapcat]

I wouldn't have deleted the 'WilRunAir' point, as that was a full interchange.  Should just be marked as closed.

No one was using it, and it was less than a mile from the points on either side of it. What am I missing?

[rickmastfan67]

I wouldn't have deleted the 'WilRunAir' point, as that was a full interchange.  Should just be marked as closed.

No one was using it, and it was less than a mile from the points on either side of it. What am I missing?

We always mark closed interchanges if they were in the file to begin with as long as there wasn't a reroute.  I'm sure others would back me up on this.

[mapcat]

We always mark closed interchanges if they were in the file to begin with as long as there wasn't a reroute.  I'm sure others would back me up on this.

Is it in the manual? Regardless, I think this is a good candidate for an exception to the precedent/rule. It was an interchange that only served a factory that shut down years ago. Evidently there is or soon will be a museum there, which is accessed via Wiard Rd. If someone who once worked at or toured that factory signs up for an account and needs that point, I'll reconsider.

[michih]

We always mark closed interchanges if they were in the file to begin with as long as there wasn't a reroute.  I'm sure others would back me up on this.

Is it in the manual?

Yes, it is: https://travelmapping.net/devel/manual/maintenance.php#closed

Add an asterisk(*) at the beginning of the waypoint and leave it otherwise unchanged.

I don' think that we need an exception, do we?

Not (yet) marking solved.

[mapcat]

I still see preserving that point as unnecessary. The only reason to keep it is because of an arbitrary guideline that may not have anticipated unimportant interchanges.

[Markkos1992]

I still see preserving that point as unnecessary. The only reason to keep it is because of an arbitrary guideline that may not have anticipated unimportant interchanges.

I agree with you on this one based on the cirumstances.  I recently suggested that mapmikey remove a point on VA 28 due to a wrong point label with other interchanges nearby.