The stateemnt "traffic engineers use signals in combination with signs and markings to help controlbusy streets, roadways, and highways." is true.Traffic engineers utilize a combination of signals, signs, and markings to efficiently managetraffic flow, enhance safety, and minimize congestion on busy streets, roadways, and highways. These tools work together to provide clear guidance to drivers, cyclists, and pedestrians.Signals, such astraffic lights, regulate the movement of vehicles at intersections. Signs provide important information like speed limits and directions, while markings on the road indicate lanes, pedestrian crossings, and other necessary guidance.By coordinating these elements, traffic engineers can create a safer and more efficienttransportation system.To know more abouttraffic flowclick on below link:brainly.com/question/21479413##SPJ11...

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