Traffic Engineers and Lawmakers, State Traffic Laws, Road Rules - Defensive Driving, Traffic School, Drivers Ed Test Answers*Prior Insurance (within 30 days)Traffic engineers use signals in combination with signs and markings to_"Lowest auto insurance ratesA.) improve gas mileageBe knowledgeable about coverage*Avoid unnecessary coverageB.) cause traffic jamsC) distract the driver"Consider higher deductiblesD.) control and manage busy streets