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Data Dictionary
Data Dictionary: ACS 2011 (5-Year Estimates)
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Survey: ACS 2011 (5-Year Estimates)
Data Source: Social Explorer; U.S. Census Bureau
Data set: Social Explorer Tables: ACS 2011 (5-Year Estimates) (SE)
Table: A09001. Travel Time to Work for Workers 16 Years and Over [10]
Universe: Workers 16 Years and Over
Variable Details
A09001. Travel Time to Work for Workers 16 Years and Over
Universe: Workers 16 Years and Over
A09001_001Workers 16 Years and Over:
Percent base:
None - percentages not computed (variable is a universe)
Aggregation method:
Addition
Formula used to compute this variable:
Return_Value = ACS11_5yr:B08301001; if (ACS11_5yr:B08301001.IsNull) Return_Value.IsNull = true
Variables used in the formula:
ACS11_5yr:B08301001
Workers 16 Years and Over
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2007-2011 Summary File: Technical Documentation.
  The 2007-2011 ACS 5-Year Summary File Technical Documentation -> Appendix A. Supplemental Documentation -> Subject Definitions -> Population Variables -> Journey to Work -> Means of Transportation to Work -> Travel Time to Work
Travel Time to Work
The data on travel time to work were derived from answers to Question 34. This question was asked of people who indicated in Question 29 that they worked at some time during the reference week, and who reported in Question 31 that they worked outside their home. Travel time to work refers to the total number of minutes that it usually took the worker to get from home to work during the reference week. The elapsed time includes time spent waiting for public transportation, picking up passengers in carpools, and time spent in other activities related to getting to work. (See "Reference Week.")

Aggregate Travel Time to Work (in Minutes)
Aggregate travel time to work is calculated by adding all of the travel times (in minutes) for workers who did not work at home. Aggregate travel times of workers having specific characteristics also are computed. The aggregate travel time is subject to rounding, which means that all cells in a matrix are rounded to the nearest 5 minutes. (For more information, see "Aggregate" under "Derived Measures.")

Mean Travel Time to Work (in Minutes)
Mean travel time to work (in minutes) is the average travel time that workers usually took to get from home to work (one way) during the reference week. This measure is obtained by dividing the total number of minutes taken to get from home to work (the aggregate travel time) by the number of workers 16 years old and over who did not work at home. The travel time includes time spent waiting for public transportation, picking up passengers and carpools, and time spent in other activities related to getting to work. Mean travel times of workers having specific characteristics also are computed. For example, the mean travel time of workers traveling 45 or more minutes to work is computed by dividing the aggregate travel time of workers whose travel times were 45 or more minutes by the number of workers whose travel times were 45 or more minutes. The aggregate travel time to work used to calculate mean travel time to work is rounded. (For more information, see "Aggregate Travel Time to Work (in Minutes).") Mean travel time is rounded to the nearest tenth of a minute. (For more information on means, see "Derived Measures.")