Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Map of all counties in the continental United States in 2010, highlighting in gray all counties assumed to have bicycle commuters—that is, those in which American Community Survey estimates with a margin of error excluded the possibility that there were no county residents who commuted by bicycle. The highlighted counties were included in this analysis; all others were excluded.
