The DC leaf collection comes through before the truck with leaf blowers and moves everything from the sidewalk/ curb into the street for the truck to pick up. They also have never in 15 years shown up on my street within the date range given on the flier you may have received from DPW. You can bag up your leaves yourself if they bother you but if you did in fact miss the collection the leaves you rake into the tree box aren’t likely to stay there until the truck rolls around again in January or so.