MUTCD Chapter 6 provides a table that can be referred to to calculate how ahead a road construction sign or road work sign must be installed from transition or point of restriction. The first work zone sign or advanced warning sign must be placed 100 feet from the road work. Subsequently, the distance between the first and the second sign and the second and the third sign must also be 100 feet on urban roads where vehicles run at low speed. (The third sign here is the first one in a three-sign series encountered by a driver approaching a traffic control zone.) If the speed limit is set high on these urban roads, these same signs must be placed 350 feet ahead of the road work.