Katonah Fire Department was dispatched to a two-vehicle MVA on I-684 Southbound north of the Route 35 bridge. Upon arrival, firefighters found one car on the shoulder under the Route 35 bridge, and a second vehicle taking up the middle and passing lanes of the southbound highway. The occupant of that car was taken by KBHVAC to a local hospital. KFD crews assisted with traffic control and scene cleanup.