What is the minimum sound distance a vehicle's horn must be audible under normal conditions?

The minimum sound distance a vehicle's horn must be audible under normal conditions is 200 feet. This standard is established to ensure that drivers can signal or alert other road users effectively in a timely manner, promoting safety on the roads. A horn that can be heard from this distance allows for adequate distance for reactions from other drivers or pedestrians, enabling them to take necessary actions to avoid potential hazards. This requirement reflects the importance placed on communication through sound in traffic scenarios, particularly in preventing accidents and enhancing overall road safety for all users.