Reflective clothing, also known as high-visibility warning clothing, is designed to signal the user in places and situations that may pose a potential threat to their health and safety
When you wear reflective gear, you can avoid appearing "invisible" from the driver, especially during low-light hours of the day and night. In fact, you're still four times as likely to be hit by a vehicle at night. That said, accidents can also occur during the day, especially in low-visibility areas such as tunnels.
So it is very important to wear reflective material at night. It has been proven to prevent accidents and fatalities in potentially hazardous environments, especially where large vehicles move, such as buildings and industrial areas.