Arlington National Cemetery is open to the public at 8 a.m. 365 days a year. From April 1 to Sept. 30 the cemetery closes at 7 p.m.; the other six months it closes at 5 p.m.

Ample paid parking is available to visitors, accessible from Memorial Drive. As of June 1, 2008, the cost is $1.75/hour for the first three hours, and $2.00/hour thereafter. Commercial rates are $7.00/hr for the first three hours. During all hours the cemetery is open the Arlington National Cemetery Metro stop is regularly served by highspeed subway trains. The cemetery is also a stop on most tour guides' itineraries, and is serviced by Tourmobile, the popular tour buses that allow patrons unlimited reboarding for a single daily rate.

http://www.arlingtoncemetery.org/visitor_information/anc_facts.html