Via I-66: Take the Washington Beltway to exit 45B (if driving from the north or west) or 49B (if driving from the south or east), I-66 East. {Note: there is a minimum 2 persons per car during the weekend rush hours from 6:30 am to 9am eastbound and 4 to 6pm westbound. All other times there are no restrictions on the number of people in the car.} Take Exit 71, Glebe Road/Fairfax Dr. Follow the exit ramp onto Fairfax Drive for 4/10th mile. Turn right at the second stop light to head south on Glebe Road for 4/10th mile. Turn left at the second stoplight on Glebe to go into the Ballston Commons Shopping Mall garage. *Once you have parked in the garage, use the elevators to go to the second floor of the mall. Head toward the center of the mall and then turn right to pass by the atrium and walk through the skyway to cross Wilson Blvd. The start point is next to the ATM in a small room to the left just inside the next building. On weekend mornings, the skyway across Wilson is sometimes blocked. If a gate blocks your way, simply leave the mall at street level and enter the NSF building through its main doors at 9th and Stuart Streets.

Via US-50: Take the Washington Beltway to Exit 50, US-50/Arlington Blvd and head east towards Arlington. Continue east on US-50 for 3.2 miles, bearing right to exit the road onto a ramp leading to Falls Church and Alexandria via VA-7 and VA-338. At the stoplight at the top of the ramp, continue straight across VA-7 and then immediately bear left, following the signs to VA-613 and Clarendon to head east on Wilson Blvd. Continue on Wilson for 2.4 miles to the intersection with Glebe Rd. Turn right to head southeast on Glebe for 2/10th mile, turning left at the next stoplight to go into the Ballston Commons Mall garage. Continue instructions from * above.

From the east via I-66: Drive west on I-66. Take exit 71 (Glebe Road). Turn left at the end of the ramp. Continue south on Glebe for 8/10th mile. Turn left at the 5th stoplight on Glebe to go into Ballston Commons Mall garage. Continue instructions from * above.

Via Metro: Take the Orange Line to Ballston/Marymount U station. Exit station using the only set of escalators. Continue straight into the building before you. Bear right through the central hallway, go up the escalator, cross the skyway over one street, continue straight past the atrium of the NSF building. The start point is in a room with an ATM just before the skyway leading to the Ballston Commons Mall.