My office address is 203 Hudson Hall, Durham, NC 27708.
The visitor parking lot, however, is not adjacent to this building.
Click here to see the driving direction to the visitors parking lot (also called PG IV or Bryan Center Parking) inside the Duke campus;
you would need to come to Erwin Road first, and these directions start from the intersection of Erwin Road and Research Drive.
After parking, you would have to walk to the Hudson Hall Engineering building -- you will see this building if you zoom into the map (its in the northward direction).