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.
Demand represents the number of trips per day. The upper panel represents the result of March 2014. The lower panel represents the results of March 2012 (left) and March 2013 (right).
