DRL, or Daytime Running Lights, are lights on a vehicle that automatically turn on during the day to make the vehicle more visible to other drivers. They are typically lower intensity than headlights and are designed to improve safety by increasing a vehicle's visibility in daylight conditions.

• Purpose: DRLs are primarily designed to enhance the visibility of the vehicle to other drivers, pedestrians, and cyclists during daylight hours. They help others on the road see your vehicle's presence, position, and movement. 

• How they work: DRLs usually activate automatically when the vehicle's engine is started and turn off when the headlights are turned on. They are typically located on the front of the vehicle. 

• Difference from headlights: DRLs are not intended to illuminate the road ahead like headlights. They are designed to be brighter than parking lights but not as bright as headlights, minimizing glare while still being noticeable. 

• Regulations: In some regions, like Canada, DRLs are mandatory for all new vehicles. In the U.S., they are not mandatory but are often included as a standard feature in newer vehicles. 

• Safety: Studies have shown that DRLs can reduce the number of accidents, particularly head-on collisions, by improving visibility. 

(This text is generated by Google AI)