HAI's main office is:

300 N. Stonestreet Avenue
Rockville, MD 20850-1655
Phone: (301) 279-9697
Map by MapQuest

By Metrorail and Metrobus:

Take the Red Line train to Rockville station. Exit the metro station to the East. Upon exiting the station, follow the sidewalk north to the intersection of Park Road and N. Stonestreet Avenue. We are located 200 yards up on N. Stonestreet on the west side; the building can be identified by its colorful mosaic.

By Car:

From Baltimore and the Northeast Corridor: Take I-95 South to I-495, the Capital Beltway. Take I-495 West towards Silver Spring. Follow the signs for I-270 North. Take I-270 North to Highway 189, Great Falls Road East. Stay to the right where the road becomes Maryland Avenue. Stay on Maryland until it ends at E. Middle Lane and turn right. After you cross Route 355 (Middle Lane now becomes Park Road) take the first left onto N. Stonestreet Avenue. We are located 200 yards up on N. Stonestreet on the west side; the building can be identified by its colorful mosaic.

From Frederick and Northern Maryland: Take I-270 South to Exit 6, West Montgomery Avenue, and make a left at the exit light. Go to the third traffic light and make a left onto W. Montgomery Avenue. Go to the first traffic light and make a left onto N. Washington Street. At the next traffic light make a right onto E. Middle Lane. After you cross Route 355 (Middle Lane now becomes Park Road) take the first left onto N. Stonestreet Avenue. We are located 200 yards up on N. Stonestreet on the west side; the building can be identified by its colorful mosaic.

From Virginia, Washington DC, and Points South: Take I-495, the Capital Beltway, toward Maryland. Follow the signs for I-270 North. Take I-270 North to Highway 189, Great Falls Road East. Stay to the right where the road becomes Maryland Avenue. Stay on Maryland until it ends at E. Middle Lane and turn right. After you cross Route 355 (Middle Lane now becomes Park Road) take the first left onto N. Stonestreet Avenue. We are located 200 yards up on N. Stonestreet on the west side; the building can be identified by its colorful mosaic.