NAME: US INTERSTATE SYSTEM III
TYPE: Census
SIZE: 221 observations , 4 variables (2 numeric, 2 character)

DESCRIPTIVE ABSTRACT:
This dataset consists of a listing of all US 3-digit interstate
highways (spurs and connecters), treating the highway/state
combination as the sampling unit.

SOURCE:
Rand McNally - 1993 Business Traveler's Road Atlas and Guide
to Major Cities.

VARIABLE DESCRIPTIONS:
Interstate #            Columns 1-3
state                   Columns 5-6
Approximate miles       Columns 8-10
Location                Columns 12-45

SPECIAL NOTES:
The miles are approximate, as author read them off maps using
guide markers provided along highways. Highways that begin with
odd numbers are spurs, highways that begin with even numbers 
are connecters.

STORY BEHIND THE DATA:
Author, who is very interested in maps, geography, and U.S.
transportation system had a lot of free time one weekend. He
knew of no source that provided such information. Other datasets
were also created at the same time.

PEDAGOGICAL NOTES:
While this data may be more suited for cocktail parties than
the classroom, it does allow a teacher to use some actual data
when teaching concepts of descriptive statistics, such as graphical
and numeric descriptions of a set of measurements. After having
taught many classes and using the terms 'suppose we have the following
measurements ...', the author vowed to get more interesting data.
Data can be used in SAS courses to teach sorting and combining
techniques.

SUBMITTED BY:
Larry Winner
Department of Statistics, University of Florida
103 Griffin/Floyd Hall, Gainesville, FL 32611
winner@stat.ufl.edu