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Work on Shoulders <br /> 1. The ROAD WORK AHEAD sign on an intersecting roadway is not required if drivers emerging <br /> from that roadway will encounter another advance warning sign before they reach this activity <br /> area. <br /> 2. A SHOULDER WORK sign should be placed on the left side of a divided or one-way roadway <br /> only if the left shoulder is affected. <br /> 3. For short-duration operations 60 minutes or less, all signs and channelizing devices may be <br /> eliminated if a vehicle with an activated flashing or revolving yellow light is used. <br /> 4. WORKER signs may be used instead of SHOULDER WORK signs. <br />