A lot! There were more than 3.2 million cars, trucks, and other vehicles registered in area jurisdictions in 1998. This number does not include those of visitors, and of residents not required to register vehicles with area jurisdictions. Government vehicles are included in Maryland and the District. With about 1.9 registered vehicles per household, it is little wonder that the roads are crowded and getting more so. In just four years from 1994 to 1998, there were 211,174 additional vehicles added to the total number in the area. Fairfax County alone added 49,384 vehicles.