"Table 4-1 Unknown residential status weighting classes ",, Weighting Class,Census Region,MSA Status* 1,"NE, W",1 2,"NE, W",2 3,"NE, W","3, 4" 4,"NE, W",5 5,"S, MW","1, 2" 6,"S, MW",3 7,"S, MW","4, 5" *MSA status definition:,, 1 = In the Center City of an MSA,, "2 = Outside the Center City of an MSA, but inside the county containing the Center City",, 3 = Inside a Suburban County of the MSA,, 4 = In an MSA that has NO Center City,, 5 = Not in an MSA,, Source: 2002 Transportation Availability and Use Study,,