Then usable tread depth is compared to remaining tread depth in order to calculate tread wear percentages. For example, a tire that started with 10/32 of original tread depth and has worn off 4/32 (down to 6/32 of remaining tread depth) is 50% worn.
1 If you know the census tract number: Use the IRS list of 2014 Qualified Census Tracts by county. 2  If you have a street address: Visit HUD's interactive QCT Map and enter the property address to view what Census Tract the property is located.
Many times, researchers will refer to a Census tract as Census Tract 7 or Census Tract 9.01. But Census Tract 7 or 9.01 doesn't uniquely identify the Census tract; in fact, there are hundreds of Census Tract 7s in the United States. A Census tract is uniquely identified by using its complete 11 digit Census tract number. For example, Census Tract 48-201-533701 is located in Harris County, Texas. The 48 is the FIPS code for Texas; the 201 is the FIPS code for Harris County; and the 533701 identifies the specific Census Tract.