Dr. Gridlock was online and chatting with readers on Monday afternoon, answering your questions about anything and everything relating to transit and travel. Topics included obeying stop signs, the Humpback Bridge replacement, the New York Avenue bridge reconstruction and, of course, Metro escalators.

Head here see what was discussed. And if you submitted a question that wasn’t answered, check this blog in the near future: he will be answering some of those questions in this space.