Union County and the town of Arispe are “exchanging responsibilities for certain streets,” reports the Creston News Advertiser. It was supposed to be done in 2018 but didn’t get formalized.
Officially, H45 has run along Forbes Street, as can be seen in this DOT city map. Moving it to Dutcher Street, a block south, would straighten the route. It’s not necessarily a change that will appear in the field, since H45 is nearly all gravel except for a few miles of “blacktop” in the Arispe area and the town’s streets are blacktop and gravel.
Maybe it would cause Google to go through town and update the one old set of images and do more than one street, but I doubt it.