The route heads southeast along the Airport Expressway, a four-lane limited-access highway through the town of Gates.

No exits exist along the expressway; in fact, it only comes in contact with one highway (Pixley Road, which it passes over).

[4] The route heads through a small residential neighborhood on the outskirts of Tressmar, which then gives way to more commercial and industrial surroundings.

Past the Wegmans offices, the road dips sharply in elevation to pass under the Rochester and Southern Railroad.

The highway runs along the northern edge of the airport grounds toward the Erie Canal, where it meets I-390 at exit 18 on the southern bank of the waterway, the eastern end of NY 204.

[4] The portion of Brooks Avenue from Howard Road in Gates to Genesee Park Boulevard in Rochester was originally designated as part of NY 47 between 1935 and 1938.