Verification of a Psychological Effect of Hiding Speedometer when Exceeding a Speed Limit

On a good road, drivers tend to exceed the legal speed limit because of their sense of security that they are not in danger. However, in some cases, serious accidents are often due to driving at high speed. In this research, to promote safe driving, we propose a natural method to get drivers to slow down by hiding a part of the speedometer. Since the driver cannot see the entire speedometer, they may feel uneasy about driving at an excessive speed. So, to keep their sense of security, the driver may go more slowly. To verify the effectiveness of this system, tests using a motorbike were conducted for 13 participants. Our results show that most participants reduced their speed.