At a four-way stop, the driver reaching the intersection first may proceedbefore the other drivers (after coming to a complete stop). • At an intersection where there is no stop sign or traffic signal (with theexception of roundabouts), drivers must yield to vehicles coming from the righthttp://dor.mo.gov/forms/Driver_Guide.pdfА как вы из четырех машин определяете the driver furthest to the right?  В такой ситуации у каждого водителя будет кто-то справа.