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Data Dictionary: ACS 2010 (3-Year Estimates)
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Data Source: U.S. Census Bureau
Table: C08203. Number of Workers in Household by Vehicles Available [25]
Universe: Households
Table Details
C08203. Number of Workers in Household by Vehicles Available
Universe: Households
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2008-2010 Summary File: Technical Documentation.
  ACS 2010 3-Year Summary File: Technical Documentation -> Appendix A. Supplemental Documentation -> 2010 Subject Definitions -> Population Variables -> Work Experience -> Number of Workers in Family in the Past 12 Months
Number of Workers in Family in the Past 12 Months
The term "worker" as used for these data is defined based on the criteria for work status in the past 12 months.

Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2008-2010 Summary File: Technical Documentation.
  ACS 2010 3-Year Summary File: Technical Documentation -> Appendix A. Supplemental Documentation -> 2010 Subject Definitions -> Population Variables -> Household Type and Relationship -> Household
Household
A household includes all the people who occupy a housing unit. (People not living in households are classified as living in group quarters.) A housing unit is a house, an apartment, a mobile home, a group of rooms, or a single room that is occupied (or if vacant, is intended for occupancy) as separate living quarters. Separate living quarters are those in which the occupants live separately from any other people in the building and which have direct access from the outside of the building or through a common hall. The occupants may be a single family, one person living alone, two or more families living together, or any other group of related or unrelated people who share living arrangements.

Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2008-2010 Summary File: Technical Documentation.
  ACS 2010 3-Year Summary File: Technical Documentation -> Appendix A. Supplemental Documentation -> 2010 Subject Definitions -> Population Variables -> Journey to Work -> Workers Per Car, Truck, or Van
Workers Per Car, Truck, or Van
Workers per car, truck, or van is a ratio obtained by dividing the aggregate number of workers who reported using a car, truck, or van to get to work by the number of such vehicles that they used. Workers per car, truck, or van is rounded to the nearest hundredth. This measure also may be known as "Workers per private vehicle."

Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2008-2010 Summary File: Technical Documentation.
  ACS 2010 3-Year Summary File: Technical Documentation -> Appendix A. Supplemental Documentation -> 2010 Subject Definitions -> Population Variables -> Journey to Work -> Private Vehicle Occupancy
Private Vehicle Occupancy
The data on private vehicle occupancy were derived from answers to Question 32. 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 their means of transportation to work was "Car, truck, or van." Data were tabulated for workers 16 years old and over, that is, members of the Armed Forces and civilians who were at work during the reference week. (See "Reference Week.")
Private vehicle occupancy refers to the number of people who usually rode to work in the vehicle during the reference week. The category, "Drove alone," includes people who usually drove alone to work as well as people who were driven to work by someone who then drove back home or to a non-work destination. The category, "Carpooled," includes workers who reported that two or more people usually rode to work in the vehicle during the reference week.