1. A vehicle traffic control system, comprising: an emitter configured to emit electromagnetic radiation into a detection area; a detector configured to detect retro-reflected electromagnetic radiation resulting from retro-reflection of the emitted electromagnetic radiation from retro-reflective markers within the detection area; control circuitry communicatively coupled to the emitter and the detector, wherein the control circuitry is configured to monitor the retro-reflected electromagnetic radiation detected by the detector and evaluate information relating to one or more vehicles within a detection area based on the monitored retro-reflected electromagnetic radiation; an automated device communicatively coupled to the control circuitry and configured to provide a user-perceivable indication relating to the one or more vehicles in the detection area, wherein the control circuitry is configured to cause the automated device to provide specific user-perceivable indications based on the evaluated information relating to the one or more vehicles; a parking structure having a parking space, wherein the parking space comprises the retro-reflective markers positioned within an area corresponding to an expected location of a vehicle when the vehicle is parked within the parking space; and wherein the parking space corresponds to at least a portion of the detection area, and the control circuitry is configured to determine whether the parking space is occupied by the vehicle based on retro-reflection by the retro-reflective markers.