A vehicle safety system used to enhance the safety of motorists by emitting warning signals from a remote unit. The humeral stem functions as a universal platform that may be used in either conventional or \u201creverse\u201d total shoulder arthroplasties, as well as hemi shoulder arthroplasties, and may remain implanted in place during a revision in which the implant system is converted between the foregoing configurations, for example. The substrate is etched through the openings to form forming a plurality of trenches separating multiple semiconductor mesas. Following this second filtering process, the at least one desired channel is applied to the circulator for re-inserting into the optical fiber, as illustrated in FIG. The invention also relates to test kits useful in the methods.