In setting up traffic control devices, which sequence is recommended?

• A. Start with advance warning signs and work down to the work site.
• B. Place all devices without regard to order.
• C. Begin with cones at the work site and move outward.
• D. Only post temporary stop signs at each end of the zone.

Answer: (A)

Starting with advance warning signs and then moving down toward the work site creates a clear, proactive path for drivers. This setup gives motorists plenty of notice before they reach the work zone, allowing them to slow down, change lanes if needed, and follow the designated path through the area. It establishes a predictable flow from far upstream to the work zone, so drivers aren’t surprised by abrupt changes and can adjust gradually as they approach the site. The sequence also supports effective tapering of lanes and proper channelization, which keeps workers safer by reducing sudden lane shifts and rear-end collisions.

If you skip the early warning step or start near the work site, drivers won’t have time to react, and the traffic flow can become chaotic. Placing all devices without regard to order would remove the essential progression that guides motorists safely from the approach to the end of the zone. Merely posting stop signs at the ends doesn’t provide the continuous guidance and speed management needed to navigate through the entire work area safely.