交通部高速公路局大多使用「台」而非「臺」，尤其是指示標誌的用字。為符合現狀，應以「台中」為佳。可參見：https://www.freeway.gov.tw/Publish.aspx?cnid=1906&p=4620

Thanks for the reminder. This makes much more sense, I will check my edits and fix it.

Those footways are green lane sidwalk along the road, and previous version was not link to other road network.
I think just add sidewalk key to way/55240288 is a better method.
(osm.wiki/Sidewalks#Sidewalk_as_refinement_to_a_highway )