What is the recommended height for warning signs in a work zone?

Answer: B — 7 feet above the ground

The recommended height for warning signs in a work zone is typically 7 feet above the ground. This height ensures that the signs are adequately visible to both drivers and pedestrians, providing clear warnings about the work zone. Proper sign placement is crucial for safety; positioning the signs too low might obstruct visibility, while placing them too high could reduce their effectiveness. Aligning with the 7-foot standard helps ensure that signs can be seen over vehicles and other obstructions, allowing enough time for road users to respond to the warnings appropriately. This practice is vital in maintaining the flow of traffic while ensuring the safety of both workers and drivers in a construction or maintenance area.