Dulles airport is planning for a surge in private plane traffic.

WASHINGTON (CNN) - Cars, limos and buses aren't the only modes of transportation that will find parking at a premium on Inauguration Day.

Dulles International Airport said Monday it will temporarily close its newest runway to provide parking for an expected surge in private planes during the big event.

The 9,400-foot runway known to pilots as 1L/19R will be closed from January 16 to 23, said Tara Hamilton, spokeswoman for the Washington Metropolitan Airports Authority. The airport is "guesstimating" that some 500 private aircraft will arrive at Dulles, and the runway will provide an overflow capacity for general aviation aircraft.

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Amtrak is adding more service to deal with expected inauguration crowds.

WASHINGTON (CNN) - Automobile traffic will be diverted; bridges closed. But from Amtrak, there's a bit of good news about Inauguration Day travel.

Amtrak says that it has increased the number - and length - of trains running to Washington on January 20, and that tickets are still available.

But they're going quick.

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