|Data Dictionary:||ACS 2008 -- 2010 (3-Year Estimates)|
|Data Source:||U.S. Census Bureau|
Universe: Occupied housing units
|ACS 2010 3-Year Summary File: Technical Documentation -> Appendix A. Supplemental Documentation -> 2010 Subject Definitions -> Population Variables -> Journey to Work -> Aggregate Number of Vehicles (Car, Truck, or Van) Used in Commuting|
The aggregate number of vehicles used in commuting is derived by counting each person who drove alone as occupying one vehicle, each person who reported being in a two-person carpool as occupying one-half of a vehicle, each person who reported being in a three-person carpool as occupying one-third of a vehicle, and so on, then summing all the vehicles. This aggregate is used in the calculation for "workers per car, truck, or van."