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This data collection contains FIPS codes for state, county, county subdivision, and place, along with the 1990 Census tract number for each side of the street for the urban cores of 550 counties in the United States. Street names, including prefix and/or suffix direction (north, southeast, etc.) and street type (avenue, lane, etc.) are provided, as well as the address range for that portion of the street located within a particular Census tract and the corresponding Census tract number. The FIPS county subdivision and place codes can be used to determine the correct Census tract number when streets with identical names and ranges exist in different parts of the same county. Contiguous block segments that have consecutive address ranges along a street and that have the same geographic codes (state, county, Census tract, county subdivision, and place) have been collapsed together and are represented by a single record with a single address range.本数据集收录了美国550个县的城市核心区内，各州、县、县分区及建制地的联邦信息处理标准（FIPS）代码，以及各街道两侧对应的1990年人口普查街区（Census Tract）编号。数据集同时提供街道名称（含前缀/后缀方位词，如北、东南等，以及街道类型，如大道、小巷等）、对应人口普查街区内该路段的地址区间，以及对应的人口普查街区编号。当同一县内不同区域存在名称与地址区间完全一致的街道时，可通过FIPS县分区及建制地代码确定正确的人口普查街区编号。对于同一条街道上地址区间连续、且地理代码（州、县、人口普查街区、县分区及建制地）完全一致的连续街区段，已将其合并为单条记录，并以单一地址区间进行表征。