NYS VTL 1172 defines when a vehicle must stop at a stop sign or yield sign. According to the statute, a driver must come to a complete stop at a yield sign only if circumstances require it. In other words, if no other vehicles are present or near, then a complete stop is not necessary. However, if other vehicles are in or near the path and they do not have a yield or stop sign, then a driver must stop at the yield sign and wait for the road to be clear.