Do you have questions about your commute? Concerns about something transportation-related? Or are you just annoyed about something and need a place to vent?

If so, chat with the doctor. Dr . Gridlock will be online for a live discussion with readers on Monday at noon. Head here to submit questions early. Head back here on Monday at noon for the chat.

(If you can’t make it, a transcript will be available at the same link once the chat is over.)