I was stopped riding back from a tour. It was after midnight, and I was on the Schuylkill River Trail. The trail is supposed to be open 24 hours a day, but the parks and adjoining land close at dusk. I recall the cop greeting me with "Going out for a bike ride?" Once he heard my story of getting back late after a mechanical problem, and saw my Lycra and panniers, he wished me a safe trip back home (12 miles) and drove off.