A Transportation Security Administration diorama, a runner-up in the annual Washington Post Peeps competition. (Deb Lindsey/for The Washington Post)

Dr. Gridlock reports on the rebuilding of Arlington Boulevard, a project that’s been delaying your travels and drawing questions in his weekly chats.

The winner of the 2011 Washington Post Peeps Diorama Contest has been announced. The finalists include satiric looks at travelers’ frustration with the Transportation Security Administration and Metro’s escalator problems.

Post transportation writer Ashley Halsey III tells us how the 2011 budget deal may offer some relief for the traffic that BRAC will bring to Fort Belvoir and Bethesda. However, improvements won’t happen overnight, and the deadline for the military personnel moves is September.

Ashley also reports that the U.S. Travel Association, which includes airlines, airports, hotel corporations and others, plans to step up efforts to lobby Congress to begin a “trusted traveler” program for aviation security.

How are high gas prices affecting you? Weigh in on our survey.

The blog Unsuck D.C. Metro has video from a lot at Huntington Metro station depicting some parking habits of Metro workers.

The NYC Aviation blog has close-up photos of the damage that resulted when an Air France jumbo jet clipped a Delta regional plane. The NTSB is investigating.

Virginia Atlantic blogs about the strangest things air travelers have tried to check.

The San Francisco Chronicle reports that IBM, the University of California-Berkeley and a California transportation authority are working on a traffic system that would forecast backups. We could use that on the Beltway.

Transportation Secretary Ray LaHood talks about the importance of passing a new long-term transportation funding bill on his Fast Lane blog. The country hasn’t had one in two years, but has depended on a series of temporary measures to keep funds flowing.

What else is going on in transportation? Share the story in the comments below.