High Quality Content by WIKIPEDIA articles! The LaSalle Expressway (also known as the LaSalle Arterial) is a 2.62-mile (4.22 km) limited-access highway in Niagara County, New York, in the United States. It begins near the North Grand Island Bridge at an interchange with Interstate 190 (I-190) in Niagara Falls and ends just south of the Niagara Falls International Airport at Williams Road in Wheatfield. The LaSalle Expressway is part of New York State Route 951A (NY 951A), an unsigned reference route; the other, 0.42-mile (0.68 km) portion is located along Niagara Street between the Rainbow Bridge and Fifth Street in downtown Niagara Falls. Most of this portion, which is not connected to the LaSalle Expressway, is also part of the signed NY 384.