GARDEN CITY - It's a big day for Bloomingdale's shoppers on Long Island.A new Bloomingdale's outlet store opened today at The Gallery at Westbury Plaza, where all merchandise will be marked down between 35 and 75 percent off original prices every day.A spokesperson for Bloomingdale's said the store's opening will be great for Long Island and has already created about 60 jobs.However, some neighbors say they're concerned about the traffic the new shopping strip will bring to the area.A Nassau Department of Public Works spokesperson says changes to Old Country Road have been made to provide a smooth traffic flow in the area.