You are stopped in a line of vehicles waiting at a stop sign. If there is no cross traffic after the vehicles ahead have passed through the intersection, you:
May proceed through the intersection without stopping again.
Must stop again at the stop sign or stop line before proceeding.
May slowly roll past the stop sign.
May follow the vehicle directly ahead of you without stopping.
You must always bring your vehicle to a complete stop and yield to approaching traffic before proceeding past a stop sign. Don't feel pressured by surrounding traffic to avoid making a complete stop.