Heres some interesting DRL...........trivia? GM originally proposed DRL use to NHTSA in 1990 for North American Vehicles, their reason was to standardize NA vehicle production since Canada had mandated them. NHTSA objected for a few reasons, refractry or stray light issues, and studies conducted showed they had no affect on "most" vehicles. Two places that showed safety improvements were motorcycle accident reduction, 3.7% and light truck and van accident reduction of 5.7% At this time there are no Federal mandates to require DRL's, only local which are hard to enforce since you can simply buy a vehicle in a neighboring municipality that isnt equipt and not required to be. There were proposals to for federal restrictions on light intensity, capping them at 1,500 cd but those proposals have all but died and arent actively being persued at this time.