Many outdoor workers were excused from having to toil in low temperatures Tuesday, but others braved the single digits — including Gainesville public works crews — to maintain the city. Gainesville Public Works Director David Dockery said solid waste and street maintenance crews were out working by 7 a.m. in freezing temperatures. “Our street department has a staff of 30 and for everyone in that division, with the exception of a secretary and shopkeeper, it’s pretty much a field job,” Dockery said.