We certainly have seen a increase in morning activity with the high afternoon temperatures. Conversely, I hardly have to use my bell after getting off the Mt Vernon Trail in the evening.
I generally leave my house at 6:30am and the traffic is pretty busy by then. A couple of weeks ago I left a few minutes before 6am – wow what a difference that made! The traffic on the W&OD was down about 75%, I saw a TON of rabbits, and the street traffic was also way down. If I could just somehow do that every day, but then reality sets in… in the form of a snooze button.