What is the minimum vertical clearance required for a sign installed above a sidewalk according to the U.S. Manual on Uniform Traffic Control Devices?

The minimum vertical clearance required for a sign installed above a sidewalk, as specified by the U.S. Manual on Uniform Traffic Control Devices (MUTCD), is indeed 7 feet. This requirement ensures that pedestrian traffic can move freely without obstruction from overhead signage.

By maintaining a minimum clearance of 7 feet, the regulations accommodate individuals using the sidewalk, including those who may be taller or are using mobility devices such as wheelchairs. It also helps to prevent accidents that might occur if a sign is positioned too low, ensuring safety and accessibility for all pedestrians.

The choice of 7 feet reflects a standard that balances the need for visibility of traffic control devices while ensuring pedestrian safety is not compromised. This height is recognized as adequate to prevent injury and make the area functional for various users.