This segment between the bridges is currently (December 2018) closed to all access. According to source http://www.ameliaislandtrail.org/maps.html , it was damaged by Hurricane Matthew (October 2016). The A1A bridge is the preferred detour for cyclists, which has separate cycle lanes.

Is the "Bicycle Shop Loop" a route that is published, promoted, or signed or by a local government entity (such as the City of Huntsville or the chamber of commerce)?

There is now a parking lot here for a future Krogers grocery store, possibly with a stripmall.

OSM is a public map that might cause people to think there are public (semi-public) features on private property. It may cause unwanted visitors seeking out features they saw on the map. You might want to add access=private.

A park by its nature is a very public feature and a "Zen Space" is atleast semi-public. I would discourage mapping those unless the property owner desires for visitors.