Which devices are utilized to provide temporary traffic control during roadwork?

Traffic cones are specifically designed for providing temporary traffic control during roadwork. They are highly visible and can be easily deployed to create delineation, direct traffic, and enhance safety for both workers and motorists in areas where road conditions change. Their bright colors make them effective in various weather conditions and during different light conditions, which is crucial for alerting drivers to potential hazards.

Additionally, while other devices listed may serve different purposes, they do not primarily function as temporary traffic control. Flashing lamps are often used for signaling but do not physically block or redirect traffic. Delineators indicate the edges of roadways or paths but are not as versatile or effective for temporary, rapid deployment in a work zone. Bollards typically serve as a fixed point of protection or boundary and aren’t suitable for temporary adjustments in traffic patterns. Therefore, traffic cones are the most suitable device for the specified purpose of temporary traffic control during roadwork.