Chat with Dr. Gridlock at noon today

Dr. Gridlock was online today to answer questions from readers. If you missed the chat, head here for the transcript. Topics included Segways, Red Line renovations and traveling regionalisms. If you submitted a question but it wasn’t answered, check back on this blog — Dr. Gridlock will be tackling some of those in the near future.

Mark Berman is a reporter on the National staff. He runs Post Nation, a destination for breaking news and developing stories from around the country.
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