                            USER NOTE 01

The user notes shown below are current as of the end of 
November, 1995 and relate to Parts 1, 2, and 3 of the 1990
Census Transportation Planning Package. The first column gives
the region code of the area affected by the note, the second 
gives the name of the main city and state in the region, and
the third column describes the change, correction, or error.


Code Name             Description
---- ---------------  -------------------------------------

All  All areas        The data contained on the Compact Discs
                      released by the Bureau of Transportation
                      Statistics (BTS), unless indicated other-
                      wise by subsequent user notes, are as
                      released by the Bureau of the Census. 
                      However, some obvious place-of-work coding 
                      errors may have been identified and 
                      corrected by local metropolitan planning 
                      organizations (MPO) in their work with 
                      the data. Thus, there may be differences
                      between the numbers shown on these CDs
                      and the data being used by MPOs in their
                      planning activities. If such discrepancies
                      are noted by users of the data, they
                      should contact the MPO to learn the nature
                      of the corrections. A list of MPO contacts
                      may be found in the \DOCS directory of
                      this CD, in the file MPOADDR.ASC

09   Connecticut      A small number of persons (85) working in
                      the state were coded to water blocks as
                      their place of work location. Since in the
                      TIGER/Line Files the same code was given
                      to all water blocks in a block group or
                      tract, and since in the CTPP only one code
                      ("WATER") was given to all water blocks in
                      the region, it is not possible to draw a
                      unique, contiguous boundary for water
                      blocks. Therefore, the TransVU-CTPP
                      Edition software is not able to access
                      the data records for water blocks.
                      TAZ-level data extracts derived with the
                      software will not include these records.
                      This affects extracts for Part 2 of the
                      CTPP, and for Part 3 extracts done by
                      workplace. The Part 3 extracts for TAZs
                      done by residence are not affected and
                      will include all data records in the file.

34   New Jersey       Because of an error in the region definition
                      file (omission of the CODINGRATE statement),
                      the data for the State of New Jersey
                      contain all of the place-of-work
                      allocations performed in the census,
                      including those done entirely randomly. This
                      was not the intention of the state nor of
                      the Census Bureau. The region definition
                      file (34.REG) and place default file
                      (34PLC.DEF) distributed with the BTS CDs
                      have been altered to make them consistent
                      with the data files. A CODINGRATE statement
                      of 0.0 was added to 34.REG, and an empty
                      place default file was substituted for the
                      one originally transmitted to the state.

2360 Erie, PA         Because of an error in processing the CTPP
                      for Erie (the place default file was
                      missing), all of the place-of-work
                      allocations performed in the census are
                      provided in the data, including those done
                      entirely randomly. This was not the intent
                      of the state or MPO, nor of the Census Bureau.
                      The region definition file (2360.REG) and place
                      default file (2360PLC.DEF) distributed with
                      the BTS CDs have been altered to make them
                      consistent with the data files. The coding-
                      rate in 2360.REG was changed 0.0, and an
                      empty place default file was substituted
                      for the one originally transmitted to the
                      state and the MPO.

3080 Green Bay, WI    An incorrect (out of date) version of the
                      place default file (3080PLC.DEF) was sent
                      to Caliper Corporation. The codes shown on
                      the old list are different than those in
                      the new file and reflected in the data.
                      As a result, Caliper found no data for the
                      areas shown on the list they received,
                      and built no boundaries for the areas.
                      Therefore, the Trans-VU-CTPP software is
                      unable to access the data for the 5,051
                      workers not coded to a block in the
                      remainder of Brown County. TAZ-level
                      data extracts derived with the software
                      will not include these records. This
                      affects extracts for Part 2 of the
                      CTPP, and for Part 3 extracts done by
                      workplace. The Part 3 extracts for TAZs
                      done by residence are not affected and
                      will include all data records in the file.
                      These workers are shown in the data as
                      working in default TAZ number df0005, as
                      shown on the correct version of the place
                      default file contained on the BTS CD.
                      

4480 Los Angeles, CA  Because of an error in the region definition
                      file (omission of the CODINGRATE statement),
                      the data for the Los Angeles region (SCAG)  
                      contain all of the place-of-work  
                      allocations performed in the census,
                      including those done entirely randomly. This
                      was not the intention of the MPO nor of
                      the Census Bureau. The region definition
                      file (4480.REG) and place default file
                      (4480PLC.DEF) distributed with the BTS CDs
                      have been altered to make them consistent
                      with the data files. A CODINGRATE statement
                      of 0.0 was added to 4480.REG, and an empty
                      place default file was substituted for the
                      one originally transmitted to the MPO.

6480 Rhode Island     In the Rhode Island CTPP, a number of persons
                      (5,767) show up in Part 2 as working in a
                      particular census tract, but with a zero
                      in the block group of work field. These 16
                      records represent cases where the block of
                      work could not be determined during the
                      coding process. Allocations to the block
                      level were not used in these cases because
                      the places the tracts are located in fall
                      below the CODINGRATE cutoff. Since these
                      cases did not fit the expected data type,
                      Caliper Corporation did not build boundary
                      files for these areas. Therefore, the TransVU-
                      CTPP Edition software is not able to access
                      these data records. TAZ-level data extracts
                      derived with the software will not include
                      these records. This affects extracts for
                      Part 2 of the CTPP, and for Part 3
                      extracts done by workplace. The Part 3
                      extracts for TAZs done by residence are
                      not affected and will include all data
                      records in the file.

7560 Scranton, PA     Because of an error in the region definition
                      file (omission of the CODINGRATE statement),
                      as well as an error in processing the CTPP
                      for Scranton (the place default file was 
                      missing), the data for the Scranton--Wilkes-
                      Barre region contain all of the place-of-work 
                      allocations performed in the census,
                      including those done entirely randomly. This
                      was not the intent of the state or MPO, nor of 
                      the Census Bureau. The region definition
                      file (7560.REG) distributed with the BTS CD
                      has been altered by adding a CODINGRATE 
                      statement of 0.0 to it to make it consistent
                      with the data files. The place default 
                      file contained on the CD is empty, which is
                      consistent with the new CODINGRATE parameter 
                      and with the data files on the CD.