NIST Main Gate Requirements
Visitors can access the Gaithersburg campus from the main gate at W. Diamond Ave. and Bureau Drive only. When a Guest/Visitor checks in at the NIST Visitor Center at Gate A (Main Gate) and intends to drive into the campus, they will have to show two documents: a Photo I.D. (State issued driver's license, Federal ID or passport) and a Vehicle Registration card. If a guest does not have a valid vehicle registration, they will be required to park at the Visitor Center and take the NIST Campus Shuttle. Visitors driving rental cars can show their rental agreement in lieu of vehicle registration.
Once you leave the Visitor Center, you will be asked to show the name badge you picked up and a photo ID before being admitted onto the campus. At the main entrance stop sign, make a left, follow until you see signs for the Administration Building (101) (it's the tallest building). There is ample free visitor parking across from the Administration Building. Visitors must wear a visitor badge at all times while on the NIST campus.