Vehicle operation safety related indicia (VSRI) displaying apparatus(es) disclosed display, adjacent or proximate a vehicle surface at least generally vehicle operator facing, VSRI on a vehicle operator facing surface of a VSRI display member, slidably positionable between a VSRI non-revealed and a VSRI revealed state displaying VSRI extended outwardly from a side of the apparatus. VSRI subject-matter, optionally-illuminated and/or electro-mechanically positioned, depicts one or more objects extending outwardly from at least one side of a vehicle having an in-use VSRI display apparatus, or from a vehicle rack or towed device. VSRI display apparatus variants include a housing or body appearing and/or shaped like the vehicle, or side(s) thereof, having an in-use apparatus. Secondary indicia displaying surface-areas also provided, concurrently display additional VSRI and/or advertising, promotional or cross-promotional content associated with a maker, proprietor or service-provider of VSRI depicted subject matter, wherein all VSRI is repeatedly visually perceptible and viewable at-a-glance.