 Just after the river crossing, exit 14 is a major interchange with the Massachusetts Turnpike (I-90) before entering the city of Holyoke where exit 15 is located.Just after exit 16 U.S. Route 202, I-91 goes from three lanes to two lanes in each direction to the Vermont state line.After a short exit-less stretch, I-91 enters Northampton, passing the Northampton Airport and an oxbow lake.