From Baltimore or
from Baltimore/Washington Int'l Airport:

Take I-195 West.

Take Exit 4B to I-95 South, towards Washington.

Take Exit 27 to I-495 West (the Capital Beltway) towards Silver Spring.

Take Exit 35 to 270 North

Take Exit 8 to Shady Grove Rd

Turn left onto Shady Grove Rd

Take Shady Grove Rd to Key West Ave (.4 miles)

Turn right onto Key West Ave

Take Key West Ave to Broschart Rd (about .6 miles)

Turn left onto Broschart Rd

Go about .2 miles to BD Biosciences at 15010 Broschart Road