A BRIDGE CONSTRUCTION IS PARTICULARLY HAZARDOUS, NOT WELL DEFINED, AND A TRAIN OF CARS WILL HAVE TO WEAVE BACK AND FORTH BETWEEN ONE TWO OR MORE LANES, WHICH OF THE FOLLOWING METHODS OF TRAFFIC CONTROL SHOULD BE USED?

A BRIDGE CONSTRUCTION IS PARTICULARLY HAZARDOUS, NOT WELL DEFINED, AND A TRAIN OF CARS WILL HAVE TO WEAVE BACK AND FORTH BETWEEN ONE TWO OR MORE LANES, WHICH OF THE FOLLOWING METHODS OF TRAFFIC CONTROL SHOULD BE USED?