Which of these is a common method of traffic control during construction?

Using cones and barriers is a widely recognized method of traffic control during construction. This approach involves placing physical markers to direct and guide vehicles safely around construction zones. Cones and barriers clearly delineate work areas, protect workers, and minimize the risk of accidents by informing drivers of potential hazards and changing road conditions.

The use of cones and barriers also helps maintain the flow of traffic while ensuring that the construction site is secure and organized. This method is not only practical but also enhances safety for both drivers and construction personnel by creating a visible separation between the roadway and the work area.

The other options might not effectively contribute to safe and efficient traffic control during construction. For instance, setting up additional lanes could be unrealistic or unsafe in many construction scenarios. Increasing speed limits is counterproductive to safety and offers inconsistent driving conditions, which can lead to accidents. Offering discounts for passing through such areas does not address safety or traffic flow issues and may be viewed as an inadequate response to the challenges presented by roadwork. Thus, utilizing cones and barriers stands out as a standard practice in ensuring safety and efficient traffic management around construction sites.