How high should a flag tree be above the roadway?

A flag tree should be at least 8 feet above the roadway to ensure clear visibility and safety for both motorists and workers in a work zone. This height is essential for allowing vehicles of varying sizes, including trucks and larger vehicles, to pass underneath without obstruction. This clearance helps to minimize the risk of accidents that could arise from low-hanging signs or flags and ensures that the warning signals are effective in alerting drivers to upcoming work zone conditions. Additionally, maintaining the proper height aids in keeping the flags visible, even in instances where vehicles may be closely following one another.