These are all of the roads from the U.S. Census Bureau 2000 TIGER
files. Most of the roads were digitized from 1:100,000 scale maps by
the US Geological Survey. Roads added to the database after 1990 were
digitized by the Census Bureau from various sources.
Some roads that exactly follow county lines exist twice in the TIGER
database -- once for each county that they appear in. One of each of
these pairs has been removed from the version of this data set that
is on the SDE server at the State Library and the statewide shapefile
on the web site. The individual county shapefiles on the web site are
also missing these duplicate roads, so most county shapefiles will not
have all of the roads that fall exactly on their boundaries.
