I saw this comment on the WABA forums:

"A person there referred to the cyclist as a she--there were a bunch of floral print bags next to his/her wrecked bike and when I saw the cyclist, they appeared to have long hair. The cyclist was not in good shape it appeared. Conscious, but not moving. It appears the cyclist was crossing inside the crosswalk, and got hit by a driver turning left. This crosswalk does not always have a walk signal--you have to press the awkwardly located button to get the signal. Even if you have the walk signal, the left turning cars have a green light though. I have had a number of near-misses at this light because drivers aren't looking when they turn left. "

The only thing I don't like about Potomac Ave. Trail is that you have to cross the intersection of Potomac and Glebe to continue riding on the trail. Granted, this is nothing compared to WO&D and its multitude of road crossings, but it's still a trouble spot. I've habitually crossed on the north crosswalk but will start crossing on the south crosswalk to avoid cars turning left from Glebe to Potomac.

Did you know about the pedestrian tunnel under Duke St, near the intersection with Diagonal? I found out about that from the WABA forums. You have to dismount and walk your bike to enter the tunnel, or face the wrath of the security guard, but it's a nice option. Heading southeast on Diagonal, you'll see the tunnel entrance on your right after you pass the access road for the buses.

In the morning I prefer to take Huntington Ave. towards Rt. 1, then use the left turn lane to get on the MUP, then bridge, heading to Washington St. In the evening I prefer the Potomac Ave. Trail, then eventually the Telegraph-Eisenhower overpass to return home.

I have a Cygolite 850 mounted on my helmet for night riding, pointing just in front of my wheel to spot road hazards. The two lowest settings are fine, even on the darkest part of the MVT. It complements the dyno hub lights nicely. I got it for about $80 on Amazon - worth every penny.