What are the most common traffic control devices for work zones?

1 Types of traffic control devices

Traffic control devices are classified into four main types: signs, markings, signals, and channelizing devices. Each type has a specific function and color code to convey information to road users. Signs are the most common and visible type of traffic control devices, used to inform, warn, or direct drivers about work zone conditions, regulations, or hazards. They can be fixed or portable and have different shapes and colors to indicate their message. Markings are lines, symbols, or words painted or applied on the pavement or curbs to define the travel lanes, guide drivers, or indicate boundaries of the work zone. Signals use lights, sounds, or messages to control the traffic flow or warn of hazards or emergencies. Channelizing devices are barriers, cones, drums, or other devices that physically separate or guide traffic through a work zone. All of these types can be either permanent or temporary and have different colors to indicate their meaning. Therefore, traffic control devices provide essential information for road users and help ensure safety in work zones.

2 Functions of traffic control devices

Traffic control devices have three main functions: regulation, warning, and guidance. Each of these is designed to communicate with road users and has a specific objective. Regulation devices enforce traffic laws and rules, such as signs that indicate speed limits, lane closures, detours, or prohibitions, as well as signals that control the traffic flow or priority. The goal of the regulation function is to ensure the safety and efficiency of the traffic movement and work operations. Warning devices alert drivers to the presence, location, or nature of a work zone or a hazard. They include signs that indicate type, duration, or distance of a work zone or a hazard, as well as signals that flash or emit sounds to attract attention. The warning function aims to reduce the risk of crashes or conflicts by increasing drivers' awareness and caution. Guidance devices provide drivers with information or direction they need to navigate through a work zone. This includes signs that indicate route, destination, or distance of a work zone or a detour, as well as markings and channelizing devices that define travel lanes, curves, or turns. The goal of the guidance function is to enhance drivers' confidence and comfort by reducing uncertainty and confusion.

4 Benefits of traffic control devices

Traffic control devices can provide various benefits for both workers and drivers in a work zone, such as improved safety, mobility, and satisfaction. These devices can reduce the frequency and severity of crashes or injuries by regulating, warning, and guiding the road users. They can also manage the traffic demand and capacity to minimize traffic disruptions and delays. Additionally, clear and accurate information can be provided to enhance customer satisfaction and public perception, while improving driving comfort and confidence in a work zone.