In May 2013, the US Census Bureau released commuter-adjusted daytime population estimates for places, minor civil divisions (MCDs), counties, and states based on the 5-year-2006-2010 American Community Survey (ACS) estimates. These estimates took into account the total population and the number of workers commuting into and out of each area on a daily basis. The commuter-adjusted daytime population estimates provided an overall estimate of population fluctuation in a given area based on commuting throughout the day. This type of information may be useful for emergency management planning, transportation planning, and development.