In 2003, the Accreditation Council for Graduate Medical Education (ACGME) instituted the common duty hour standards, which included an 80-hour workweek averaged over four weeks and an adequate rest period, which was defined as 10 hours of rest per duty period. For emergency medicine, this was further defined such that residents may work no more than 12 continuous hours with an equivalent amount of time off between scheduled work periods. An emergency medicine resident may work no more than 60 scheduled hours in an ED and no more than 72 duty hours in total per week . What has not been considered is whether resident commuting time has any impact on a resident’s workweek, well-being, and/or rest time and if resident commuting time should be considered in calculating total resident work hours. Barger et al. found that extended duration work shifts, defined as greater than 24 hours, posed safety hazards for interns. The risk of falling asleep while driving or while stopped in traffic was also increased when working five or more extended shifts .