1. In Table 1, Total Workers include Civilian Employed and those working in the Armed Forces.
2. In Table 2, Public Transportation includes: Bus or trolley bus, Streetcar or trolley car, Subway or elevated, Railroad, and Ferryboat.
3. In Table 3, Mean Travel Time to Work does not include workers working at home.
4. If numbers or percents cannot be calculated, “— “ is used instead.
5. Margin of Error (MOE): Because the sample size of the American Community Survey is much smaller than the decennial census “long form,” it is more important to understand the potential errors in the tabulated results. Calculation of Standard errors for some of the data elements on these profiles will be based on the Census Bureau method detailed at http://www.census.gov/acs/www/Downloads/handbooks/ACSResearch.pdf. These have been expressed on the profile sheets as “Margins of Error” either as a +/- of a count, or of a percentage, using a 90 percent confidence interval.
6. Since there is no “light rail” option in the ACS questionnaire for the Means of Transportation, we are finding that in some cases, e.g. Houston, TX, people are likely choosing “Other” for the light rail. In other cases, e.g. San Diego, the light rail is called “The Trolley”. For your area, you may need to include the “other” category when attempting to get a transit total if the light rail is available.