INTRODUCTION File Description What It Is The TIGER/Census Tract Street Index (Version 2),(TIGER/CTSI(V2)), is a file, by county or statistical equivalent, of the streets in a county, address ranges on each street, and the corresponding census tract or block numbering area (BNA) codes for each address range. Also shown for the address ranges are U.S. Postal ZIP Code numbers and the 103rd Congressional District number. This file contains only city-style addresses. P.O. Boxes and other non-sequential addresses are not shown. Where Federal regulations require coding addresses to 1990 census tract numbers, this file provides the materials for accurately determining these numbers. Improvements Version 2 of the TIGER/CTSI provides address-range and related information for over 74 million individual residential addresses in most of the 3,141 counties (or statistical equivalents) in the United States (Puerto Rico is not included). Version 1 covered about 55 million individual addresses. Put another way, address coverage has climbed from 43 percent of all residential addresses in Version 1 to 69 percent in Version 2. New information in Version 2 of the CTSI are ZIP Codes and 103rd Congressional District numbers. Using It Examining the street name/address file record, a user will find codes for the FIPS State and county, Census Minor Civil Division (MCD - see Geographic Definitions for description), and Place, FIPS MCD and Place, census tract or block numbering area (BNA), 103rd Congressional District, Metropolitan Area, and the ZIP code. This identifying information is followed by the low and high address range, parity indicator, address type, (numeric or non-numeric), filler, street name, and area name (up to 20 characters). The component parts of the street name are prefix type, feature name, suffix type, suffix direction, and extension. These components are combined to form the contents of this field. If the resulting combination exceeds 40 characters, the feature name is truncated. For the States of Connecticut, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont and Wisconsin, please note that we show the name of the MCD if the address is located outside a place. The file was produced to show numbered streets, state highways, U.S. routes, etc., first. When streets with identical names exist in different parts of a county, the FIPS place or MCD code and area name should help the user to determine the correct census tract number. Likewise the ZIP code, where a street traverses more than one ZIP Code area, will aid users to identify the correct tract number. Contiguous block segments that have consecutive address ranges along a street and the same geographic codes (State, county, 103rd Congressional District, place or MCD, ZIP code, and census tract) are collapsed together and represented by a single record with one address range. Address Ranges Address-range files have the following parity values as follow: B = Both - Refers to odd and even address ranges that are on opposite sides of the street, but are within the same Census tract, ZIP code, 103rd Congressional District, place, and county subdivision. This parity designation is assigned to the collapsed addresses. E = Even - Refers to even-numbered addresses on the same side of the street. O = Odd - Refers to odd-numbered addresses on the same side of the street. Product Limitations In almost all counties or statistically equivalent areas, the Census Bureau has added potential address ranges and ZIP codes created from the Census Bureau's 1990 Address Control File, a computerized mailing list used in the 1990 census. (Potential address ranges include the full range of possible structure addresses even though the actual structures might not exist.) Because the Address Control File consists of residential addresses, it is unlikely that address ranges added to street segments from this source that are occupied solely by businesses will be shown. Nor is there address-range information for areas with post-office-box only or rural-type addresses (such as RFD addresses). The extent of address-range coverage varies for each county, from less than 20 percent for some to greater than 90 percent for others. Users who have questions about the coverage for any county should contact Customer Services Branch (telephone: 301/763-INFO(4636); FAX: 301/457-4714) before purchasing the product. Future TIGER/Census Tract Street Index Versions Recognizing the need to continually update street and address information in preparation for the next census, the Bureau recently entered into a working partnership with the United States Postal Service to update the street, address-range, and ZIP code information on a regular basis. This means that we will be able to offer future updates to this product before the next census. In addition to the Postal updates, the Census Bureau would like to update street and address information that are missing or incorrectly shown in Version 2. To accomplish this, we ask that you provide us with any current information that would improve future editions of the TIGER/CTSI. The easiest way to do this is on a map that shows the new information (streets and/or address ranges) with respect to adjacent streets that are contained in the CTSI. Please be sure that the state, county and place names or FIPS codes are noted on the map. Please send them to: Attention: CTSI Product Support Group at Customer Services, Bureau of the Census, Washington, DC 20233 (telephone: 301/457-1202; FAX: 301/457-4714). Other Media This index also is available in printed form and computer tape. It may be purchased in these media from Customer Services, Bureau of the Census, Washington, DC 20233 (telephone: 301/763-INFO(4636); FAX: 301/457-4714). The Map Alternative An alternative method for determining the correct census tract or BNA number for an address is through the use of Census Tract/Block Numbering Area Outline Maps. These maps are sold as packages, by metropolitan area and the non-metropolitan balance of each state according to June 30, 1990 metropolitan area definitions. The map sheets are 36 by 42 inches. They display the features that make up the census tract boundaries, the names of the features, and the census tract numbers. They do not show detailed street grids within census tracts but, in conjunction with local reference maps, can help a user to determine tract numbers accurately. The Government Printing Office sells these printed maps. Call the Census Bureau's Customer Services on 301/763-INFO(4636) for prices and ordering information. Related Products The National Institute of Standards and Technology publishes several reference reports, which serve as Federal Information Processing Standards (FIPS). These publications contain more detailed information about codes for States, metropolitan areas, counties, places, and county subdivisions (including minor civil divisions) and can be ordered from the National Technical Information Service (telephone: 703/487-4650; FAX: 703/321- 8547). They are: - FIPS PUB 8-5 Metropolitan Statistical Areas (MSAs) (Including CMSAs, PMSAs, and NECMAs) - FIPS PUB 5-2 Codes for the Identification of the States, the District of Columbia and the Outlying Areas of the United States, and Associated Areas - FIPS PUB 6-4 Counties and Equivalent Entities of the United States, Its Possessions and Associated Areas - FIPS PUB 9-1 Congressional Districts of the United States - FIPS PUB 55DC-4 Guideline: Codes for Named Populated Places, Primary County Divisions, and Other Locational Entities of the United States and Outlying Areas For HMDA and CRA Reporters Those who use this product to fulfill their reporting obligations under the Home Mortgage Disclosure Act or the Community Reinvestment Act (CRA) and have questions about compliance should contact their supervisory agency. To obtain information about valid census tract numbers and other reference materials, contact the Federal Reserve HMDA hotline (telephone 202/452-2016). --------------------------------------------------------------------------- Geographic Definitions Block Numbering Areas (BNA's)--These are areas delineated by State agencies and/or the Census Bureau for counties also without census tracts. The delineation of BNA's follows the same basic criteria as census tracts. Block numbering areas follow the same numbering format as census tracts. The basic number range for BNA's is 9500 to 9989 and the suffix range is "85" to "99". Because BNA's appear more often in lightly populated counties, they may have fewer people. Census Tracts--These are geographic entities within a county (or statistical equivalent of a county) defined by a committee of local data users. When first established, census tracts should have relatively homogeneous demographic characteristics. Generally, census tracts have a population size between 2,500 and 8,000 people, and average about 4,000 people. The committee of local data users can delineate census tracts for special land uses, such as military installations and American Indian Reservations. Census tract numbers are expressed as a 4-digit basic number and optional 2-digit suffix number. A decimal point separates the basic number from the suffix. The suffix is blank if the census tract does not have a suffix. Suffixes smaller than 10 have a leading zero. The basic number range for census tracts is 1 to 9499 and the suffix range is "01" to "99". Congressional Districts--These are the 435 areas from which persons are elected to the U.S. House of Representatives. The congressional districts in this product are for the 103rd Congressional Districts, in effect from January 1, 1993 through December 31, 1994. They reflect redistricting based upon the 1990 Census. Congressional districts are numbered uniquely within State and range from 1 to 52. In addition, the following additional codes may appear in this field: "00" - at large and "98" - non-voting delegate (District of Columbia). Alaska, Delaware, Montana, North Dakota, South Dakota, Vermont and Wyoming have a single "at-large" congressional district. Counties and Statistically Equivalent Entities--The first-order divisions of each State are counties for 48 States, parishes for Louisiana, and boroughs and census areas for Alaska. In addition, the Census Bureau treats the following entities as equivalents of counties for purposes of data presentation: independent cities in Maryland, Missouri, Nevada, and Virginia; the portion of Yellowstone National Park in Montana; and the "District of Columbia" for the District of Columbia. Minor Civil Division (MCD's)--For twelve states, we show the minor civil division names for areas not located in a place. The states are: Connecticut, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Vermont and Wisconsin. MCD's are the primary political or administrative divisions of a county in the 12 states referenced. In these states, most MCD's also serve as general- purpose local governments. The MCD name may be truncated on the street name/address record but will be contained in its entirety on the county and names index files. Places--These may be either legally established or Census defined. Incorporated places are legal entities incorporated under individual State law. An incorporated place can be a legal city, town, borough, or village. Incorporated places exclude: (1) the boroughs in Alaska, which are treated as county equivalents; (2) towns in the New England States, New York, and Wisconsin, which are treated as MCD's and (3) the boroughs of New York City which are treated as MCD's. A census designated place (CDP) is delineated for the decennial census as a statistical counterpart to an incorporated place. CDP's comprise densely settled concentrations of population that are identifiable by name and generally recognized locally but are not legally incorporated. --------------------------------------------------------------------------- Creating The CTSI Record From TIGER For the users who need an understanding of the procedures used for collapsing or combining address ranges from our TIGER database, the following information may be useful. In designing Version 2 of the TIGER/CTSI, the Bureau sought to incorporate comments made by the users of Version 1, namely 1) have a readily understandable street name sort, 2) include zip code information, and 3) include all possible name variations. The terms in this section may be useful in understanding the file sequence. The sort key is contained in positions 62-91 of the street name/address file under the FILLER variable. Numerically Named Roads--Roads whose names appear as numbers precede roads with alphabetic names. Roads whose names are numbers spelled out appear alphabetically with the other roads with alphabetic names. Roads whose names appear as numbers must be displayed so that all roads use this sequence. All roads with a 1-digit number should precede those with a 2- digit number, which come before those with a 3-digit number, and so forth. For example, 1st St is listed before 10th St, which is before 100th St, which is before County Hwy 1000, and so forth. The following list shows feature types that can be followed by a numeric street name: Alternate Route Rural Route Business Route Ruta Bypass Service Road Camino Spur County Road Star Route County Highway State Highway County Route State Road Farm-to-Market-Road State Route Highway Township Highway Interstate Highway Township Road Road Turnpike Route U. S. Highway Rue United States Route Collapsed Address Ranges--Contiguous segments along a street that have consecutive address ranges and that have the same geographic codes (state, county, census tract, ZIP Code, 103rd congressional district, place, and county subdivision) were collapsed together, so that, multiple segments are represented by a single record with a wider address range. For example, if Pine St. contains the even address ranges of 100-198, 200-298, 300-398, and 400-498, and the odd address ranges of 101-199, 201-299, 301-399, and 401- 499 and the geographic codes are the same for these ranges, then the ranges were collapsed to form one range from 100-499 that contains both the even and odd ranges for all these segments. When collapsing address ranges, certain constraints were followed. First, the same ends of the address ranges on each side of the segment could not differ by more than one. For example, if the even side address range for a segment of Pine St. is 100-148 and the odd side address range is 101-149, then we collapsed the address ranges. However, if the even side address range is 100-148 and the odd side address range is 101-169, we did not collapse the ranges. The high ends differ by more than one. Secondly, the gap between the ends of successive address ranges could not be greater than two. For example, if the even side address ranges for two successive segments of Pine St. are 100-148 and 150-198, and the odd side address ranges are 101-149 and 151-199, then we collapsed the address ranges. However, if the even side address ranges are 100-148 and 150-198 and the odd side address ranges are 101-149 and 155-199, we did not collapse the ranges. At least one of the gaps between address range ends is greater than two. Segments with a non-numeric or alpha-numeric address were not collapsed, e.g., Oak Ave contained the even address range of 20W450-20W560, and the odd address range of 20W451-20W561. These ranges were not collapsed even if the geography is the same for both sets of ranges. Suffix Direction--Suffix directionals follow the feature name, such as Main St E. Suffix direction pertains to N, S, E, W, NE, NW, SE, and SW. Suffix directionals appear so that the street with the directional is grouped together with same named streets without directionals. For example, if the file contains Main St, Main St E follows Main St in the TIGER/CTSI. Prefix Direction--Follow the same rules as for suffix direction, except that the directional precedes the feature name, such as E Main St.