The data on means of transportation to work were derived from answers to Question 25, which was asked of people who indicated in Question 23 that they worked at some time during the reference week. (See "Reference Week.") Means of transportation to work refers to the principal mode of travel or type of conveyance that the worker usually used to get from home to work during the reference week.
People who used different means of transportation on different days of the week were asked to specify the one they used most often, that is, the greatest number of days. People who used more than one means of transportation to get to work each day were asked to report the one used for the longest distance during the work trip. The category, "Car, truck, or van," includes workers using a car (including company cars but excluding taxicabs), a truck of one-ton capacity or less, or a van. The category, "Public transportation," includes workers who used a bus or trolley bus, streetcar or trolley car, subway or elevated, railroad, or ferryboat, even if each mode is not shown separately in the tabulation. "Carro público" is included in the public transportation category in Puerto Rico. The category, "Other means," includes workers who used a mode of travel that is not identified separately within the data distribution. The category, "Other means," may vary from table to table, depending on the amount of detail shown in a particular distribution. The means of transportation data for some areas may show workers using modes of public transportation that are not available in those areas (for example, subway or elevated riders in a metropolitan area where there is no subway or elevated service). This result is largely due to people who worked during the reference week at a location that was different from their usual place of work (such as people away from home on business in an area where subway service was available), and people who used more than one means of transportation each day but whose principal means was unavailable where they lived (for example, residents of nonmetropolitan areas who drove to the fringe of a metropolitan area, and took the commuter railroad most of the distance to work).

People may have chosen to provide two or more races either by checking two or more race response check boxes, by providing multiple responses, or by some combination of check boxes and write-in responses. The race response categories shown on the questionnaire are collapsed into the five minimum races identified by the OMB, and the Census Bureau's "Some other race" category. For data product purposes, "Two or More Races" refers to combinations of two or more of the following race categories:
1. White
2. Black or African American
3. American Indian and Alaska Native
4. Asian
5. Native Hawaiian and Other Pacific Islander
6. Some other race

There are 57 possible combinations (see below) involving the race categories shown above. Thus, according to this approach, a response of "White" and "Asia"n was tallied as two or more races, while a response of Japanese and Chinese was not because "Japanese" and "Chinese" are both Asian responses. Tabulations of responses involving reporting of two or more races within the American Indian and Alaska Native, Asian, or Native Hawaiian and Other Pacific Islander categories are available in other data products.

1. White; Black or African American


2. White; American Indian and Alaska Native


3. White; Asian


4. White; Native Hawaiian and Other Pacific Islander


5. White; Some other race


6. Black or African American; American Indian and Alaska Native


7. Black or African American; Asian


8. Black or African American; Native Hawaiian and Other Pacific Islander


9. Black or African American; Some other race


10. American Indian and Alaska Native; Asian


11. American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander


12. American Indian and Alaska Native; Some other race


13. Asian; Native Hawaiian and Other Pacific Islander


14. Asian; Some other race


15. Native Hawaiian and Other Pacific Islander; Some other race


16. White; Black or African American; American Indian and Alaska Native


17. White; Black or African American; Asian


18. White; Black or African American; Native Hawaiian and Other Pacific Islander


19. White; Black or African American; Some other race


20. White; American Indian and Alaska Native; Asian


21. White; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander


22. White; American Indian and Alaska Native; Some other race


23. White; Asian; Native Hawaiian and Other Pacific Islander


24. White; Asian; Some other race


25. White; Native Hawaiian and Other Pacific Islander; Some other race


26. Black or African American; American Indian and Alaska Native; Asian


27. Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander


28. Black or African American; American Indian and Alaska Native; Some other race


29. Black or African American; Asian; Native Hawaiian and Other Pacific Islander


30. Black or African American; Asian; Some other race


31. Black or African American; Native Hawaiian and Other Pacific Islander; Some other race


32. American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander


33. American Indian and Alaska Native; Asian; Some other race


34. American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some other race


35. Asian; Native Hawaiian and Other Pacific Islander; Some other race


36. White; Black or African American; American Indian and Alaska Native; Asian


37. White; Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander


38. White; Black or African American; American Indian and Alaska Native; Some other race


39. White; Black or African American; Asian; Native Hawaiian and Other Pacific Islander


40. White; Black or African American; Asian; Some other race


41. White; Black or African American; Native Hawaiian and Other Pacific Islander; Some other race


42. White; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander


43. White; American Indian and Alaska Native; Asian; Some other race


44. White; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some other race


45. White; Asian; Native Hawaiian and Other Pacific Islander; Some other race


46. Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander


47. Black or African American; American Indian and Alaska Native; Asian; Some other race


48. Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some other race


49. Black or African American; Asian; Native Hawaiian and Other Pacific Islander; Some other race


50. American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some other race


51. White; Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander


52. White; Black or African American; American Indian and Alaska Native; Asian; Some other race


53. White; Black or African American; American Indian and Alaska Native; Native Hawaiian and Other Pacific Islander; Some other race


54. White; Black or African American; Asian; Native Hawaiian and Other Pacific Islander; Some other race


55. White; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some other race


56. Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some other race


57. White; Black or African American; American Indian and Alaska Native; Asian; Native Hawaiian and Other Pacific Islander; Some other race

Given the many possible ways of displaying data on two or more races, data products will provide varying levels of detail. The most common presentation shows a single line indicating "Two or more races." Some data products provide totals of all 57 possible race combinations, as well as subtotals of people reporting a specific number of races, such as people reporting two races, people reporting three races, and so on. In other presentations on race, data are shown for the total number of people who reported one of the six categories alone or in combination with one or more other race categories. For example, the category, "Asian alone or in combination with one or more other races" includes people who reported Asian alone and people who reported Asian in combination with White, Black or African American, Native Hawaiian and Other Pacific Islander, and/or Some other race. This number, therefore, represents the maximum number of people who reported as Asian in the question on race. When this data presentation is used, the individual race categories will add to more than the total population because people may be included in more than one category.