Airport Access Heads Up I-90, Exit 36 (Watertown/Binghamton) east and westbound ramps to Interstate 81 north will be closed to traffic beginning Monday, November 18, to Friday November 6. Motorists are advised to follow the signed detour to I-81 south, to Exit 25 (7th North Street/Liverpool), to east on 7th North Street, to I-81 northbound.