sentences:  All four corners of the junction contain at least one shopping plaza, and the northwestern corner features the sprawling Salmon Run Mall.The commercial development follows I-81 north to its next exit, a diamond interchange with NY 12F near Jefferson Community College.At this point, I-81 turns northeastward, running south of an industrial park and north of the college before crossing the Black River to meet NY 12 in a less developed but still commercialized area north of the city.