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Chat with Dr. Gridlock at noon

Questions about your commute? Curious about congestion? Mad about Metro? The Post’s Dr. Gridlock, who specializes in such conditions, is ready to help. Dr. Gridlock will be answering reader questions today at noon, so head here now to submit questions early. Head back here at noon for the discussion.

Mark Berman covers national news for The Washington Post and anchors Post Nation, a destination for breaking news and stories from around the country.

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