This is the PowerPoint presentation Dr. Petterson used during his workshop presentation September 16, 2022. Understanding the four chances for error and the associated visual phenomena is helpful in furthering our understanding of the Looked But Failed to See (LBFTS) Right-of-Way Violation (ROWV) motorcyclist/car collision scenario. Knowing these four chances for error, and the associated phenomena, is helpful in formulating recommended actions for both riders and drivers that will lessen the chances of these types of collisions occurring. Included in this presentation is a description of a SMARTER developed driver search system that is an effective alternative to the old “look left, look right, look left again” search procedure.