Abstract: A signage apparatus includes a plug-in hitch, a slack adjuster bracket, a water-resistant sign box, and an upright post. The plug-in hitch includes opposed plates and an insert portion configured for receipt within a hitch receiver. The upright post includes a plurality of openings defined therethrough sized and dimensioned for receipt of a securement member, and positioned to correspond to a plurality of openings of the opposed plates when the upright post is received between the opposed plates. The plurality of openings include lower openings configured for coupling of the upright post to the plug-in hitch via a securement member such that the upright post is capable of rotative movement relative to the plug-in hitch about an axis defined by the securement member, such rotative movement being limited by the insert portion of the plug-in hitch.