Abstract: A compression wheel chock system is disclosed. The system is comprised of two, triangular-shaped devices having longitudinal channels and a lanyard. An object of the apparatus is to enhance wheel chocking by preventing a wheel from moving both fore and aft while chocked. During installation, the lanyard is fed through a channel in each chock and is drawn tight by the user. As the lanyard is tightened it compresses the chocks around the wheel while at the same time compressing the channels and securing the lanyard therein.

Abstract: A lighting system includes a lighting device configured to connect to an object. The lighting device includes a body and a control device. One or more ultraviolet light sources are attached to the body and connected to the control device. The ultraviolet light source(s) emit ultraviolet light in a wavelength range from 10 nm to 445 nm. The control device controls the frequency and duration of strobing of the ultraviolet light source(s). The control device cooperates with nearby emergency visible lighting and/or flashing visible light systems to designate and protect gaps in time from visible light illumination from the nearby emergency visible lighting and/or flashing visible light systems. The control device synchronizes the strobing of the ultraviolet light source(s) with the absence of visible light illumination from the nearby emergency visible lighting and/or flashing visible light systems during the designated gaps in time.

Abstract: A compression wheel chock system is disclosed. The system is comprised of two, triangular-shaped devices having longitudinal channels and a lanyard. An object of the apparatus is to enhance wheel chocking by preventing a wheel from moving both fore and aft while chocked. During installation, the lanyard is fed through a channel in each chock and is drawn tight by the user. As the lanyard is tightened it compresses the chocks around the wheel while at the same time compressing the channels and securing the lanyard therein.