It feels like a good idea to at least make the form match the form of the Wikipedia article title (less anything in parens).

Apps probably don't even use this tag anyway. It would make more sense for an app to build it from network= and osm.wiki/Tag:ref=.

One siren is on the county courthouse roof in Clayton.

All map locations are derived from Bing or Esri imagery. Manufacturer, model, decibels, and range are provided as open data from Saint Louis County.

All map locations are derived from Bing or Esri imagery. Manufacturer, model, decibels, and range are provided as open data from Saint Louis County.

All map locations are derived from Bing or Esri imagery. Manufacturer, model, decibels, and range are provided as open data from Saint Louis County.

All map locations are derived from Bing or Esri imagery. Manufacturer, model, decibels, and range are provided as open data from Saint Louis County.

All map locations are derived from Bing or Esri imagery. Manufacturer, model, decibels, and range are provided as open data from Saint Louis County.

All map locations are derived from Bing or Esri imagery. Manufacturer, model, decibels, and range are provided as open data from Saint Louis County.

Old (Missouri/Missouri State/State)? (Highway/Route)? 21 is more general because another acceptable form is "Old Missouri State Route 21".

Old (Missouri/State)? (Highway/Route)? 21 is the general form that I can think of.

Legally Union Electric lives on d/b/a Ameren Missouri.

Ameren Missouri is the trade name adopted by Union Electric when it was acquired by Ameren Corporation as part of the merger with CIPSCO, Inc.

It's possibly a candidate for construction in coming years.

I followed this up with a changeset to add access restrictions.

This is the final changeset in a series of changesets I've made specifically to fix up the border of Arnold semantically. It still needs adjustment with the river, but that doesn't impact semantics.

It did not properly take intersection semantics into account, and it did not properly exclude non-roadway areas like islands. It did not properly take sidewalks into account. It was also not edited since its introduction, so I felt it appropriate to remove.

Also Esri Clarity was used here.

Neither StreetSide nor open county records indicate Holzer Drive exists.

I don't know the origin of Holzer Drive in TIGER, but it just...doesn't exist..? There is a driveway with a parallel gated land-access track road here, and the residence to the north has an address on Missouri State Road.