Projects with 100 occupants or fewer must survey 100% of occupants. Surveying the entire population is necessary because an appropriate sample can’t be obtained when there are so few people.

Note that the USGBC Alternative Transportation Calculator published on November 15, 2013 includes an error and populates an incorrect value for the “total number of occupants required to receive the survey” (row 12) when 100 or fewer “total occupants” are entered into row 8. We strongly recommend surveying the entire population when you have 100 or fewer occupants, despite this error in the calculator.