Not sure if anyone is aware of this, but it looks like an independent 5K is scheduled for Haines Point the same time as the Duathlon.
It's probably a small race, but they may have priority of the roads reserved. This may be a non-issue, but I wanted to point it out to the powers-that-be at DC Tri in case this is a problem.
Sean, thanks for letting me know. I'm going to have to change the start/end location to where the golf course parking lot is (the same as the training tris). I'll post a separate message on the forum. -Hugh