Hours before its collapse, The Brew was on the Patapsco for another assignment and caught these images of the bridge.

Advocates say the trend shows the success of the city’s efforts to promote dockless devices not just as recreational rides, but as a practical means of commuting to work or running errands.

At a news conference, federal officials face queries about hazardous materials still on the vessel and sidestep the question of whether measures should have been taken to protect the bridge piers from marine traffic.