What is typically placed in construction zones to maintain orderly traffic flow?

In construction zones, cones and drums are commonly used to guide vehicles safely through and around work areas. These devices are designed to create clear boundaries and direct traffic flow to reduce confusion and enhance safety for both drivers and construction workers. The bright colors and reflective surfaces of cones and drums make them highly visible, especially in low-light conditions, alerting drivers to the presence of construction and the need to navigate carefully.

Traffic lights might control vehicle movement at specific intersections, but they are less common in temporary construction zones. Green arrows indicate direction at traffic lights, which does not apply to construction settings directly. Pedestrian crossings are designated areas for foot traffic, but they don’t serve the primary purpose of maintaining traffic flow in construction contexts. Hence, cones and drums are the standard tools employed to keep vehicles moving efficiently and safely through construction areas.