The City of Sanford experienced a 39.9% population growth rate between the 2000 and 2010 Census. This was more than any other City in Seminole County and more than twice the average growth rate for the State of Florida for the same period. Per the 2010 Census the City's population is 53,570.
An overview of the 2010 Census is available here: 2010 Census Quick Facts
The full 2010 Census Population profile for Sanford is available here: 2010 Census Profile
A detailed demographics report updated through January 2013 with projections is available here: January 2013 Detailed Demographic Report
Traffic Count Information
Information on Sanford area roadway segment Average Annual Daily Trips (AADT) is available here: Sanford Area Traffic Counts FDOT 2011
You may also access the Florida Department of Transportation traffic data at: FDOT Traffic Online 2011