Road transportation is a vital mode of transportation for people to travel long distances and commute to work. Horns are used as a warning signal to alert other drivers about danger or indicate other vehicles presence. However, there are many reasons why a driver may not be able to hear a horn, such as background noise, hearing impairment, weather conditions, or the use of headphones. This can lead to accidents and traffic congestion. A horn detection device (HDD) is a system that can help drivers with hearing impairment to detect horns. HDD uses ultrasonic sensors and a microphone to detect the sound of a horn. When a horn is detected, HDD will alert the driver with a visual or auditory signal. HDD is a simple and effective way to improve road safety for drivers with hearing impairment. The system is easy to install and can be used in any vehicle. HDD is also affordable and can be a valuable investment for drivers who are concerned about their safety. When a horn is detected, HDD will send an alert to the driver. The alert can be a visual signal, such as a light on the dashboard or an auditory signal, such as a beep. The driver can then take appropriate action, such as slowing down or changing lanes. HDD is a valuable safety device for drivers with hearing impairment. The system is easy to install and use. It can help to prevent accidents and traffic congestion and also gives flexibility for deaf persons to detect horns.