I think what Robert is asking is whether LEED means "to and from the building once a day" (round trip), or "to and from the building twice a day" which means two round trips.
I would agree with Tristan - it should be one round trip, or two drives (to the building in the morning and away from the building at night) total.
Jenny Carney
Vice PresidentWSP
LEEDuser Expert
657 thumbs up
May 20, 2010 - 12:23 pm
Some teams take the approach of allowing for respondents to report separately for how they get to versus from work, in which case the baseline is 2 one-way trips per day per regular occupant.
I've seen other teams just assume that the mode of transportation is the same to and fro, in which case you can use a baseline of 1 round-trip per day per regular occupant.
Just make sure you baseline matches with whether you are focusing on one-way or round-trips in your survey questions.