A

The work zones include devices that provide safety for drivers and workers. The devices can be barriers, such as drums, cones, and tubes. The other devices include temporary signs, arrow panels, pavement and markings. Workers that show directions to the drivers use flags.

Explanation:

A work zone, also called a construction zone, is the area of the highway where roadwork takes place. Such zones are equipped accordingly to the type of road and the work that will be done there. Most commonly, the work is done during the summer; however, it can exist at any time of the year.

Work zones are loaded with special signs due to the dangerous situations they may cause on the roads. Therefore, they became hazardous places for the drivers and workers, and require an investigation. The highway agencies are looking for ways of preventing the cases and improving the communication on the roads as the number of injuries and death increases.

Special people may control the direction of your movement on the roads with constructions by showing signs or flags that the driver must follow. Such workers wear bright colored vests to be noticeable, and the flag is the common safety device that they use.

Barriers, or channelizing devices, assure that the driver will not enter the area of the construction as it may be dangerous for him and the people who may work in that area. Drums, cones, and tubes are examples of barriers that prevent drivers from entering hazardous zones. The channelizing devices are located between traffic and road construction zones.

The temporary traffic signs appear as black betters or signs on an orange background. Also, such signs should show a speed limit as it is necessary to reduce speed for a safety purpose.