What is the recommended height for road cones used in temporary traffic control?

The recommended height for road cones used in temporary traffic control is within the range of 28" to 36" high, and they should be orange with two reflective bands. This specification is designed to ensure maximum visibility and recognition by drivers, which is critical for maintaining safety at work zones or during road incidents. The use of orange is standard in traffic control devices as it is highly visible to motorists and signifies caution. The reflective bands enhance visibility further, particularly in low-light conditions, helping to alert drivers to the presence of roadwork or hazards ahead.

In contrast, the other options provided have either incorrect height specifications or inappropriate colors and markings for traffic cones. This ensures that traffic cones are both effective and compliant with safety standards, which is crucial in minimizing risk and maintaining smooth traffic flow during incidents.