Place of work refers to the geographic location in which civilians at work and Aimed Forces personnel not on leave, sick, etc., carried out their occupational or job activities. These locations comprise, for the purposes of this report, central cities, other selected cities, remainders of central counties, and each of the additional counties within the standard metropolitan statistical area (SMSA). In the reports for Somerset and Middlesex Counties in New Jersey, however, the distributions are shown only within these respective counties. In all cases, 13 specific places of work are available in unpublished tabulations for each tract.

Persons with more than one job were asked to report on the job at which they worked the greatest number of hours. If salesmen, deliverymen, and others who work in several places each week reported to a central headquarters, they were requested to name the place in which they began work each day. If work was not begun at a central place each day, the person was asked to report the city and county in which he had worked the greatest number of hours.

Means of transportation to work refers to the principal mode of travel or type of conveyance used in traveling to and from work by civilians at work and Armed Forces personnel not on leave, sick, etc. For persons who used more than one means in daily travel, the enumerator was instructed that principal means referred to the means of transportation covering the greatest distance. For persons who used different means on different days, the enumerator was instructed that the proper response was the means of transportation used most frequently.