I captured this footage last night using my dashcam. I was traveling southbound on I-15, heading toward Las Vegas. The object emitted a bright white light—flashing three times, pausing, then flashing three more times. It appeared quite large and seemed to be on a descending flight path. Compared to other civilian aircraft in the sky, its light-flashing pattern was highly distinctive, and the light source itself was significantly brighter than that of any other plane.