1992 CENSUS OF TRANSPORTATION
1992 TRUCK INVENTORY AND USE SURVEY

=>THE TIUS DATA DICTIONARY VIEWED THROUGH DocView

The TIUS Data Dictionary gives a description or picture of how
the data are stored in the TIUS microdata file.  It defines how
many characters or how wide a data item is and where a data item
is located in the microdata file.  We encourage you to become
familiar with the TIUS data dictionary.

The TIUS data dictionary viewed through DocView is split into
four parts.  Parts 1-3 corresponds to the organization of the
questions on the TIUS questionnaire.  Part 4 contains data items
which were recoded or imputed.


=>  PART 1 - VEHICLE IDENTIFICATION AND OWNERSHIP

Here you'll find data items regarding description of the sample
strata, expansion factor for weighting (EXPANF) a record(s),
manufacturer, model year, when a vehicle was acquired, or how the
vehicle was acquired.


=>  PART 2 - PHYSICAL CHARACTERISTICS 

Here you'll find many of the data items which physically describe
a truck:  truck type, trailer characteristics, body type, axle
configuration, length, empty weight, average weight, or gross
weight.


=>  PART 3 - OPERATING CHARACTERISTICS

Here you'll find many of the data items which tell how a truck
was used:  number of weeks operated, annual and lifetime mileage,
area of operation, major use, principal products carried, or
hazardous materials carried.


=>  PART 4 - RECODED DATA ITEMS

Here you'll find data items which were recoded or imputed.  Two
recoded data items which are very useful are:

VEHSZE -  a code describing a truck as light, medium,
light-heavy, or heavy-heavy classification based on its average
weight.

PRNPRO - a code assigned according to the product carried the
highest percentage of 1992 annual miles.

All RI codes (RI_) show if the data was obtained from a source
other than the respondent.


=>OTHER LOCATIONS OF THE TIUS DATA DICTIONARY

We recommend you print the TIUS data dictionary for easy
reference.

If you'll be using QUICKTAB as your primary software for the TIUS
microdata file, please read the QUICKTAB GUIDE FOR THE 1992 TRUCK
INVENTORY AND USE SURVEY MICRODATA FILE (\DOCUMENT\QTIUSGUI.WP in
WordPerfect 5.1 format or \DOCUMENT\QTIUSGUI.TXT).  It contains
the instructions to print the TIUS Data Dictionary used with
QUICKTAB.

If you'll be using other software for the TIUS microdata file,
we've provided WordPerfect 5.1 (\DOCUMENT\TI92MDD.WP) and ASCII
(\DOCUMENT\TI92MDD.TXT) formatted data dictionary files.