Delta Air Lines is conducting a test boarding planes using two jet bridges at the same time. This way they can get twice as many passengers onto the aircraft at once, making the boarding process go faster.
If adopted, in the future this could mean a single jet bridge that splits off and then boards passengers through two different doors on the aircraft. For now they are using two gates next to each other to accomplish the feat. Since Cincinnati is a much smaller station for Delta than the hub it used to be, they have extra gate space to allow this kind of test.